Please remember that any mention of competitors, hinting at competitors or offering to provide details of competitors will result in an account suspension. The full rules can be found under the 'Terms and Rules' link in the bottom right corner of your screen. Just don't mention competitors in any way, shape or form and you'll be OK.
From reviews on net, BC2 is not that CPU intensive at all and noway maxes out a quad....
The game appears to be using all four cores when available. Here we used a standard Core i7 920 processor running at 2.66GHz. Please note HyperThreading was disabled and a single Radeon HD 5850 graphics card was used. As you can see none of the cores are working very hard.
Technically speaking, I can't discuss any officially unannounced products but the branch that will contain the BF:BC2 optimizations won't be out till at least towards the end of the month.