I would like to say that I've been generally happy with Stack Overflow as the official Q&A site for Android Developers. It seems to work pretty well for that purpose and I usually find what I need.
It would have been nice if Google would have taken the time to write detailed and correct documentation for Android, but unfortunately it is a rather incomplete and buggy mess right now. I've found myself hitting crashes and freezes that were a direct result of mismatches between the doc and the actual behavior of the code. One of these hits infrequently or only hit on some devices, which makes it insanely hard to debug. I filed a bug report, but apparently no-one at Google ever reads them, let alone triage them. I guess that's what they meant by being more like a startup?
Stack Overflow is nice as a community effort, but if a company wants developers to adopt their platform, proper documentation written by the people who know the code is essential. Hire some monkeys if you must, but leaving it up to the community to write their own docs is just plain lazy.
This is what I think reddit should do. There are endless arguments there over whether something belongs in /r/pics, /r/funny, /r/LI5 or /r/askscience, etc.
I always thought that a lot of what we call "subreddits" are actually orthogonal tags that apply to posts. Think about it, if there's a funny picture of a naked girl, why isn't that simultaneously in /r/pics, /r/funny, and /r/nsfw?