This seems to be a common problem, a slower performance than you'd expect with version 2.0...at least with Linux users.
I'd be interested to see the results!
EDIT: If you're experiencing lower than expected frames per second (If answering YES), post your setup!
My setup, which is experiencing lower than expected frames per second in Nexuiz:
OS: Kubuntu 6.06
CPU: AMD64 3200+
Graphics card: Gigabyte GeForce 6600GT 128MB (500Mhz GPU/1000Mhz MEM)
HDD: Seagate 300GB 7200RPM 8MB cache SATA150
Slow FPS experience still experienced with the LOWEST resolution/detail/extras etc etc...
EDIT: Update - Why of why did the last poll answer disappear?!?!?