That would be a bit boring, no? Down at 850 it's doing minerside as before the mod, and poolside slightly worse.
The output leads to the same direction: Apr 12 17:41:13 bfgminer[23935]: 20s:373.7 avg:360.5 u:309.2 kh/s
I checked with the multimeter, it's certainly a 47k resistor. That's all really strange...