No I'm using xp on my intel system with 2600xt's crossfired. Notice my main rig is amd/nvidia lol.
Anyway yeah I was comparing my 3dmark06 score with the score I got with the 8.3 drivers so yeah not as good as expected. They did manage to get rid of the studdering problem in games that you orginally had to get the hotfix for. My games seem a bit smoother.