I'm sorry that the leaderboards for Shift 1 are currently down, or I would point you to them. But times from XBox and PS3 were listed independently of each other there, and I CAN assure you, there were very noticeable differences between the platforms. Well over a second, in the case of Road America. Given that the top thirty or so lap times on just ONE platform were usually within a few tenths of a second apart, over a second or more between one platform and another is quite significant.
Don't get so bent out of shape, T-12... I am just the messenger. Mind you, I AM somewhat surprised you never visited EA's Shift Leaderboard
http://nfs.needforspeed.com/web/nfs/mynfs/shft/leaderboards?ns=nfsps2-pc to compare times. Yes, I know it's down now, but at least I went there. And found noticeable differences between platforms.
Do you have anything MORE than your subjective experience for your unshakable faith in your position? Because this site USED to be an irrefutable site for proof that things were NOT identical between platforms.