Unfortunately, not in this case.  The performance did not drop, but the bogdown is still just as terrible.  I'll try it on my other computer though, that one is not Hybrid.  I'll let you know how it turns out.

EDIT:

My other computer has two GTS 250's, with an SLI setup.  With m0mchil's miner, I have to run two separate processes, and each clocks in around 33000 khps.  With DiabloMiner, I have to only run one process and I get approximately 72000 khps, but again there's a terrible bogdown.  Playing with -w and using -f 1000 again does not drop performance, but doesn't help either.    Oh well, looks like I have to stick with m0mchil's miner on both machines.