On my gtx570 on ubuntu 13.10 at stock clocks on the gpu, I note a change from about 1075 seconds per WU (wall clock) to roughly 1177 seconds. CPU time has dropped from about 68 seconds average per WU to about 37 seconds... more "oomph" for LLR available, which is good. All just due to the nature of the work, since there has been no software change for this.
No complaints here... just an observation. "Your mileage may vary", of course :-)
"I am he as you are he as you are me and we are all together"
87*2^3496188+1 is prime! (1052460 digits)
4 is not prime! (1 digit)