Hmm,
I thought Core2's were already averageing 20% faster than X2's clock for clock.
Overall they show that kinda gain... but if you take say an X2 4800 up against a E6600 in say CSS Source Stress test the X2 will get raped silly and again with media encoding, etc. theres enourmous gains on the conroe closer to the order of twice the performance... never mind superPi and the likes.
Sounds pretty much like I was saying awhile back in earlier posts... too little too late...