According to https://github.com/mongoid/mongoid/blob/master/lib/mongoid/finders.rb#L20 #count is claiming to return an Integer. But it's not.

irb(main):001:0> Event.count
=> 7.0
irb(main):002:0> Event.count.class
=> Float

I didn't dive into current architecture but I guess it what moped returns, anyways, if it is not a bug and just outdated docs, it would be both strange and inconvenient because of extra steps needed to provide a proper rendering of count values on a page.