That's staggering if you think about it, though. Awesome.
By the way, the top downloaded Android games are barely games if you ask me: Solitaire, TossIt, Jewels, Sudoku, stuff like that. I still haven't found a game as in depth or replayable as P&T.
That being said, one of the first games I downloaded was A Brief History of Rome and never could figure out how to play it (probably a poor reflection on me, despite my preference for turn-based strategy games and predilection for anything related to classical history).