In terms of volume that is, not in terms of revenue. Apple still leads the latter on both phone sales and after market sales.
“The report states that games, mobile social networking, and music/entertainment applications are the top application categories.”
Note though that social networking apps are almost always free, and without ads, so the real money is in games and music/entertainment.
I’m wondering though, when will e.g. the Facebook app have ads? That would increase revenue considerably.