Well I did some comparison testings between my 9800 Pro and my 6800GT in EQ 2. The results taken in N Freeport. My results are pretty inconclusive though... But I assure you they are accurate.
There definately appears to be GPU limitation. But under the same conclusion its got to be a remarkably CPU limited game as well. One thing that is notable is the 6800GT's minimum framerate seems rather consistent while the ATI minimum framerate goes up as settings are lowered.