Hey, a 12 core Pro -- a beast of a machine! I know video editors who would be drooling over your rig!
I'd have to say I don't even use my macs for folding anymore -- not enough PPD to make the noise level and electricity worthwhile. By way of comparison, since the points were rebalanced for GPU folding, a recent (read that as efficient) Kepler card, GTX 660 Ti (can be bought for around $250) can pull in 36K PPD, so if anyone has any old video cards in a PC box hanging around...
Louis