Would make sense. Sept. 12th is the expected date if pre-orders are available. However, the statement of a Vodaphone online agent isn't much as far as proof.
I've just been on Vodafone live chat because I'm eligible for an upgrade. The person told me that they are accepting pre-orders on Saturday the 13th.
Hope Apple take preorders online this time rather than making us order on release and wait later than everybody. Sorry Tim, I don't have time to stand in a queue.