oclHashCat vs WPA @ 9700 H/s

[xenon]

I have an older system (dual-core Nvidia 250 GTS) and a newer system (quad-core Nvidia 650 GTX) and they are both scoring about the same in oclHashCat against WPA dictionary attack (approx. 9700 H/s). This doesn't seem right, I'd expect the 650GTX to smoke the 250GTS... yes? is something capping me? what kind of performance should I expect on these cards? (note I've been launching oclhashcat from the Windows GUI)

What am I missing? Anyone have a good noob guide/link for oclhashcat against wpa? Any links to wpa benchmarks on various cards? etc etc...

Thanks in advance!!!!