Note that thats comparing the X800XL and the 6800GT. There is still a X800XT and a X850XT and a X850XTPE to go before ATi runs out of X800 cards.
The X850XT can be assured to beat the 6800GT/GS in most games.
I found a X850XT vs. 6800GT benchmark, but there isn't one conclusive pic that I can post.
Battlefield 2 goes to X850XT.
Counter Strike: Source goes to X850XT.
HL2 goes to X850XT.
UT2004 goes to X850XT..
Doom 3 goes to 6800GT.
FarCry is TIED.
FEAR is TIED.
Chronicles of Rid**** goes to 6800GT.
X850XT - 4
Tied - 2
6800GT/GS - 2.