Here's another review of the IP35 Pro at CPU3D.com.

Performance looks pretty solid. They tested with a Q6600 and were a little disappointed with the overclocking as they could only hit 3.375Ghz (9x375).

Note, however, that this is the same max overclock they reached in their review of the ASUS P5K3 Deluxe. The MSI P35 Neo they reviewed hit 3.2Ghz (9x355).