Release Date Confusion?

[Bunsenbeaker27]

Sorry if I've missed a recent press announcement, but I am a little confused on when this game will be released. Originally when I pre-ordered at Gamestop is was 15th Sept. Then it was pushed forward to 8th Sept. Today I noticed on the 1C site that it is listed as the 4th of Sept which is a Fri? Maybe that is the ship date and the game doesn't have a set release date? Anyway, GS still has it listed at the 8th (LINK) and Amazon has it as the 15th (LINK). Anybody know anything about the 4th? Four days before DiRT 2 would be a little better than getting both on the 8th and having to ignore one of them for a day or two!