second is a good fps fight, unlike ultraxion or madness. but as you said, its 50fps average, not 60.
from what we have seen gw2 have much better gfx and beta have ultra settings blocked, that should mean the 50fps will go down to 30-40.
and yes bf3 is an exception. unlike crysis2, dirt 3, shogun or metro 2033 it has good fps, especially on nv5xx.