READ the benches just BUY AMD hardware then Linux wins!
AMD graphics? are you kidding? I like playing my blu-ray collection without skipping. I'm sold on VDPAU. ( i use AMD CPU's though ).
Totally agree. If you need any kind of performance, nVidia seems to be much more painless and featurefull than AMD.
If you want an open-source driver stack the performance is weak all over the board so you might as well settle on Intel's integrated graphics.