To be fair, the mongo people just pulled in a driver that everyone has already been using for the past 2 years or so. christkv's driver has been in use in dozens of projects -- everything from connect to mongoose. It wouldn't make sense to drastically change the API and break all the npm packages out there.
According to the npm registry, there are just over 100 packages that all depend on christkv's library. I'm sure there are more because certain libraries like mongoosejs, simply include the library as part of their package instead of a dependency.
And I have used it in a previous project. I'm not questioning the quality of the driver.
My point is the inconsistency of the driver API vs the syntax used in the `mongo` utility. I don't know how many times I've looked at the MongoDB docs and then have to figure how to do the same thing with this driver.