Even with --quiet, the slave delay logging is outputting to the log every few seconds:

Sun Jan 30 11:55:33 [initandlisten] MongoDB starting : pid=25261 port=27018 dbpath=/mongodbdata/ 64-bit

• • NOTE: This is a development version (1.7.5) of MongoDB.
  • Not recommended for production.

Sun Jan 30 11:55:33 [initandlisten] db version v1.7.5, pdfile version 4.5
Sun Jan 30 11:55:33 [initandlisten] git version: 1978898d7a013657e5400133defdc996fb4c2c15
Sun Jan 30 11:55:33 [initandlisten] sys info: Linux domU-12-31-39-06-79-A1 2.6.21.7-2.ec2.v1.2.fc8xen #1 SMP Fri Nov 20 17:48:28 EST 2009 x86_64 BOOST_LIB_VERSION=1_41
Sun Jan 30 11:55:33 [initandlisten] waiting for connections on port 27018
Sun Jan 30 11:55:33 [websvr] web admin interface listening on port 28018
Sun Jan 30 11:55:33 [startReplSets] trying to contact rs3c:27018
Sun Jan 30 11:55:34 [startReplSets] replSet STARTUP2
Sun Jan 30 11:55:34 [ReplSetHealthPollTask] replSet info rs3c:27018 is up
Sun Jan 30 11:55:34 [ReplSetHealthPollTask] replSet member rs3c:27018 SECONDARY
Sun Jan 30 11:55:34 [replica set sync] replSet SECONDARY
Sun Jan 30 11:55:34 [ReplSetHealthPollTask] replSet info rs3arbiter:27018 is up
Sun Jan 30 11:55:34 [ReplSetHealthPollTask] replSet member rs3arbiter:27018 ARBITER
Sun Jan 30 11:55:34 [ReplSetHealthPollTask] replSet info rs3a:27018 is up
Sun Jan 30 11:55:34 [ReplSetHealthPollTask] replSet member rs3a:27018 PRIMARY
Sun Jan 30 11:55:34 [ReplSetHealthPollTask] replSet info rs3b:27018 is up
Sun Jan 30 11:55:34 [ReplSetHealthPollTask] replSet member rs3b:27018 SECONDARY
Sun Jan 30 11:55:45 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:55:46 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:55:47 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:55:49 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:55:51 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:55:52 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:55:53 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:55:54 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:55:55 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:55:57 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:55:59 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:56:00 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:56:03 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:56:04 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:56:05 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:56:07 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:56:09 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:56:10 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:56:11 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:56:13 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:56:16 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:56:17 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:56:18 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:56:19 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:56:22 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:56:23 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:56:25 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:56:27 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:56:28 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:56:30 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:56:32 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:56:33 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:56:35 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:56:36 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:56:37 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:56:41 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:56:43 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:56:44 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:56:46 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:56:47 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:56:48 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:56:49 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:56:51 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:56:52 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:56:54 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:56:55 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:56:56 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:56:57 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:56:58 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:56:59 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:57:00 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:57:01 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:57:02 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:57:04 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:57:06 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:57:07 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:57:08 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:57:09 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:57:11 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:57:12 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:57:13 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:57:15 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:57:16 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:57:17 [replica set sync] replSet temp slavedelay sleep:1
Sun Jan 30 11:57:18 [replica set sync] replSet temp slavedelay sleep:1