This is some pretty serious monkey math. It doesn't matter that Android outsold iPhone 28% to 21%, it says, because iPhone grew from 16%. It omits the fact that Android grew from near 0.

It's not hurting the iPhone yet because the industry is still in a growth phase, and even with RIM holding steady there was still a 50% market share held by increasingly irrelevant OSes like Symbian and WinMo.

The real test will be the upcoming year. Most of the other OSes have faded away at this point. There's not enough marketshare left for both to grow like they did last year.