My guess would be 60k ppd each, on the good bigadv units.
I'll let you know.
Edit: It's 1% finished with a P6900. This is my first time running -bigadv so I have no idea what a good WU is. It says 46k PPD so far. My other server (just changed it to -bigadv today) with 14 cores folding a P2686 is at 41k PPD.