The new Radeon HD 2900 XT driver saves the day. Only with the new driver the card is really faster than the six month old Geforce 8800 GTX.
We only know a few examples, such as Need for Speed Carbon, where the R600XT scores 10 to 17 percent better than Geforce 8800 GTX. The previous 8.35 was not that good and the R600XT was close to G80 GTX but not better. With new 8.361 which is supposed to be the launch driver the scores are even better on ATI hardware.
Looks like ATI still has an ace of spade in its sleeve.