Maybe since engraving takes longer , apple dealed with them first but others would not take so much time
I hope this is the case (and tend to think it is actually). I pre-ordered w/o engraving on Sept 14th at the same time I ordered the iPhone. As such, I expect to get it the day it the first day it becomes available. As with others, I'll be a little frustrated if its in stores for days before I get it.
As of now, mine status is 'Processing Items'