Based on this Piper Jaffray study of the teen tech market, 37% of teenagers report they plan on buying an iPhone in the next six months. 22% already have an iPad 2. That means that one in five teenagers already has an iPad 2. That's a pretty amazing figure. The first smartphone/tablet you pick up often makes it the one you stick with over time, so this is a lot of probable life-long Apple customers coming out of this sample population of 4,500.