I'm not completely sure why this happens. But in our experience over the past 3 Christmas's, it appears that there's a huge number of new users and new app pur

I'm not completely sure why this happens. But in our experience over the past 3 Christmas's, it appears that there's a huge number of new users and new app purchasers. My guess is iPod Touches and iPhones as Christmas gifts, and also tons of iTunes gift cards that people use in Jan-March. But after the iTunes gift cards and the iPod Touch users wane a bit, the user base grows still because of iPhone and thus somehow the market is stable throughout the year.