To the people gleefully celebrating these stories about pre-orders, just stop and ask yourself why Apple would preemptively announce they won't be releasing first weekends sales figures. Companies DO NOT do that if they believe the sales numbers are going to be great.
Pre-orders "selling out" means absolutely nothing in the big scheme of things. We all know they could artificially decide to limit the early numbers, to give the impression of high demand. It's not that complicated. If sales are big, they'll let us know. If they don't want to talk numbers, there is always a reason for that, and it's not a positive one.