I think it's because of F1 2010!
[talking about europe here]
Think about it, the game already sold 400k on ps3. and 300k on 360 (PS360 owners affected) People arn't going to buy two racing games within a few weeks from eachother. Delaying GT5 a week or two would be smart because F1 2010 risked 700k GT5 buyers thus far.
And in america the preorders/marketing hasnt really taken off yet so it would be smart to wait a week or two.
Of course the Dev is going to say its for fixing bugs...thats he right thing to say. But we all know that they've already been producing the disks and perhaps shipping already







