I pre-ordered this expecting First Class delivery to deliver it ON the release date. When my order details then said it will be delivered 30 Aug, I contacted support, to which they said:
"I would like to inform you that if your purchase is eligible, you'll get the release date delivery option automatically. It appears that this order is not eligible for release date delivery because we do not offer release date delivery for this item. Placing an order via First class delivery method doesn't always guarantee a release date delivery.
If this is available for the game you're interested in, you'll see a message saying "Want to receive this the day it comes out?" on the game's Product Detail page.
The promised delivery date for your order was August 30, 2012. This was our standard promise at that time as would have been indicated in your estimated dispatch and delivery dates."
Not good enough, Amazon!
I will be cancelling my order and going to ShopTo, who guarantee its arrival ON the release date (and I have found to often actually arrive a day before).