That's wonderful.
Seeing as some people have gotten September 16th delivery estimates with phones not assigned tracking numbers, wouldn't one assume the carriers do have a number given to them by Apple of what to expect to be able to deliver?
And as pre-orders proceeded, all websites live for preordering started to adjust estimates as more orders were taken. This would lead me to believe there is a somewhat system in place for the carriers to relay to their customers what is available based on each day's stock.
Regardless of any movement physically of the phones, there will be phones coming out of the China factory that will fulfill orders earlier than promised as has happened every year, every product, every launch.
I ordered through Apple btw.