I expect last week pre-orders in the US to be a huge jump. I think the highest 1 week jump in Americas preorders was ~15k. I'd like to think this final week will be at least three times that, with week one sales being triple what the pre-orders were. When people FINALLY realize GT5 is out there will be a huge flurry of sales. Pre-orders will only account for a small percentage of overall sales.
Then again I cancelled my subscription at Gamestop for GT5 about a month ago. NO I wasn't doing it out of rage. I had pre-ordered it at the Gamestop I picked up GOW3 from (that same night actually). I had only pre-ordered GOW3 there because I knew I would be up there that night. This Gamestop is actually about 15 miles from me inside of a mall. So the last time I was in there I asked if I could pick up my GT5 pre-order at any other Gamestop and he told me no. So I cancelled it with intentions of coming to my local Gamestop (less than a quarter of a mile away) and preordering it there.
When I went in there a couple of days ago when the release date was announced, I had to wait in a line of about 8 people who were also pre-ordering it. Thats why I expect pre-orders for the final week of release to more than triple their current highest 1 week increase.
Btw, anyone know when the reviews might start coming in?