Do you believe this also applies for users searching for a specific keyword or combination of keywords? The 'above-the-fold' phenomenon. For example, 'baby feeding'? How did you do on keyword searches before you were selected by Apple (though Trainyard is a pretty unique name)?
Congratulations on your inspiring success! Are you going to release the original Tic Tac Toe game now?
I may do the tic-tac-toe game at some point as a multiplayer game.