I think so at least from the few mounts I tried on a lapped E6600 The thicker EK o-ring and more bow just introduced more mount variability and the best mounts wern't really any better than the best stock V2 mounts.
I would think having a quad core would make that even more apparent, but I'll wait to see what other people find out before I'm 100% sure.
It also probably depends a little on the TIM used. I've been testing with the www.tim-consultants.com T-C Grease 0098, it performed much better (almost 3C) better than artic ceramique did in my quick 3 mount test. Bowing should have less benefit on better TIM pastes and may also change with how thick a paste is.