Game breaking lag

I have Time Warner Cable as my ISP and very frequently (every game) lag ruins my experience. I have 35 down, 6 up, and have tried resetting everything multiple times. I have been informed that many people with TWC are having issues as well. How true is this, how bad is it for other people, and does 343i and or TWC have any idea why this is happening or how to fix it?

Ok then, really glad Blops is coming out soon.