but if they release a real game there wil be a valid ungine based test based on the real game
Nexuiz is an outdatet not FBO based energing engine so its useless for modern GPU hardware.
Xreal for exampel is a much better engine because of the FBO rendering.
DOOM3 can not drop modern gpu hardware unter 60fps means the test is useless.
you need an nativ real app/game based on OGL4.1 or 3.3 with high workload on the GPU.
you also can test windows apps in wine this dx9/dx10 apps can do much more workload than any linux game.
starcraft2 for exampel or crysis or arma2