Just saw it before you guys posted. Simply, damit. Why?! Why USB 2.0? Archaic transfer protocol should die!
I guess they want you to use the Cloud. USB 3.0 would have been nice as a selling point. However, that's not to say it can't be added in a later update (Apple intends to use the Lightning plug for "years to come" according to Phil Schiller). Note that Micro-USB is USB 2.0, as well, so it doesn't put Apple at a disadvantage.