I disagree somewhat. It definitely encourages that a first draft is created by vomiting forth - the problem with NaNo is that it doesn't do anything afterwards and most people assume that the 30,000 word piece of whatever they're left with is suitable for publishing. That's the real problem with NaNo - false advertising. For anyone looking to get an incredibly rough and dirty and detailed outline (to be murdered in editing), I think NaNo is still a great tool.
I think a week spent outlining is time better spent than a year typing shit to see what sticks. The very nature of NinnyNeener requires one to never.slow.down enough to figure out what the fuck you're doing. Some math: 14 published Novels from NinnyNinnyNooNoo (2013) 11 published Novels from NeenerNeenerNoNo (2012) 310,000 participants (2013) So. 14-11 = 3/310,000 = 0.0009% chance your NinnyNeener will be published. Meanwhile, the dismal odds editors use to get you to step up your fucking game? 0.2%. .2%/.00097% = 206 times more likely to get a NON ninny novel published. If you could do one thing that would make your book more than 200 times more likely to get published, wouldn't you do that one thing? That one thing is to not do NaNoWriMo.