ccminer 0.5 is out... hashspeeds are much better than amd cards... 750ti reports 13Mh/s (that is better than a 280x)
@reorder: sounds like a challenge to optimize cgminer better...
don't let nvidia beat amd

greetings
It is underway, this is for non-oc 280x:
GPU 1: 68.0C 2848RPM | 14.54M/13.70Mh/s | R:0.1% HW:0 WU:0.0/m T:1 xI:105
However, I am still busy adjusting vardiff.