In http://docs.mongodb.org/manual/reference/bson-types/ it would be a lot easier for me to understand this statement if you gave an example, like 1 != "1"

"When comparing values of different BSON types, MongoDB uses the following comparison order, from lowest to highest"

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Also, I think the docs at http://docs.mongodb.org/manual/reference/bson-types/ should be more specific about the following. I assume this is a statement about the BSON numeric types (32-bit int, 64-bit int, double) because JSON doesn't have a choice. I think a few sentences would be sufficient to explain the precedence. Is it int32 -> int64 -> double?

"MongoDB treats some types as equivalent for comparison purposes. For instance, numeric types undergo conversion before comparison."