http://www.engadget.com/2011/11/02/android-browser-leapfrogs-opera-mini-but-safari-increases-its-l I'm not exactly sure how these stats are gathered. For example, I think most people with an android tablet switch their user agent to ipad. I know that's the first thing I do. But whatever, it doesn't matter much. Still a fairly informative graph.
OperaMini has got to be Blackberry users. That browser kept me from stomping the shit out of my BB. The factory browser is one of the worst products to ever exist in the history of the universe.