[H]ard|OCP’s comparison of the frame rates that Vista provides versus XP has had some criticism recently.  What is being mentioned is that they only test nVIDIA cards, and not a single ATI card.  Today they rectify that, adding a ATI X1950XTX into the mix, and revisiting some of the nVIDIA scores as well.  The tests provide some interesting evidence as to where the fault of performance gap lies.
“We recently published an article comparing framerate performance in XP versus Vista on NVIDIA hardware. Our readership wanted to see what ATI could do with the same task so that we could see if Vista was really to blame for what we saw.”

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