Right. The timetable for most of those sales are going to involve what they know about Apple business sales, not what they know about how families purchase. It is unlikely, even if you're a film major, that you would want by Xmas to take with you to college next fall.
Some retailers are predicting a launch next week, but how many will they sell? 3000 Euros for a quad-core machine, or 4000 Euros for a 6-core machine...