Despite being initially dissapointed that GT5 isn't coming this year. I'm still pumped for the final product and I'm assuming this extra time will be used by PD to polish the crap out of this game. We all know this will be a beast of a game by the time it finally ships and until then, the included feature list continues to grow.
I'm in the 'pro DLC' camp but this is one game where I would like as much content, i.e cars, tracks, modes etc. shipped on the disc right from the start. Going online to download tens or hundreds of different cars and tracks, all because of an unfinished game, would of received a massive backlash. People need to remember that GT4 set the bar pretty high in this regard.
Oh and also..
If the market penetration of the slim continues on its current trend I could see why Sony might have wanted to hold out a little longer until the release of GT5 to maximise its impact for both Sony and PD. As much as I'd like GT5 in my hands right now, in the end I can wait. Uncharted 2 and a string of other great multiplat games coming will tie me over between now and then.