Not to start another flame war on (T|B)DD, but (T|B)DD does not guarantee competence in any way, and I wouldn't force it on any of the engineers who work for me.
Sadly it seems that the "ubuntu generation" of people who don't RTFM have won out.
The sheer amount of recent MongoDB hate has been extremely annoying, not to mention the half-assed reasons for justifying it - we've learned a lot of things from running MongoDB at scale, and none of them are what the haters usually whine about.