Well no it doesnt how did you came up with that... see this too:
https://en.bitcoin.it/wiki/Mining_hardware_comparison#Nvidiaagain i am not telling that I should have big MH rate with my nvidia GTX 650 ti I know the rate will suck I just dont know why it sucks that much maybe I need to do some settings? or update something besides the GPU driver... the chart that I linkded does not have my card but it has its previous revision GTX 550ti which puts out more Mh/s than GTX 250 and a stronger card of the 6xx generation that does even better so I should be in the midle..