Just got home from work and I've got a Win SMP 2684 running right now.
Here are some numbers on the rig in my signature taken from HFM.NET Benchmark viewer showing the difference between the 2684 WU in the VM and Windows:
2684 in VM: avg tpf 35:32 for 29k ppd
2684 Win SMP(in progress): avg tpf 32:21 for 33.4k ppd
These are good numbers to have.