Re: THEY RELEASE THE UPDATE (@Mark)
I've seen some security researchers be quite concerned about the slow proliferation of Android updates too, and I'm pretty sure they're not motivated by iPhone fanaticism. The basic complaint is that differences between versions of the published source code are an authoritative documentation of security problems that Google recognised in the previous version, and if a serious security problem is found there's no point telling everyone to update their OS because a large number of them can't do that thanks to HTC-or-whomever.
Other than that I think you're right about choice, though the "years behind the competition" stuff is obviously a stretch. See e.g. the web browser — a pretty fundamental component. You could copy and paste in Android's as of April 2009. You could copy and paste in the iPhone's as of June 2009.