TGA!
MW3 is messed up because they are penalizing those with faster connections/host. Versus the little benefit that group may have received in Black Ops/MW2. The patch on TG day was supposed to have fixed this. But just yesterday, I felt faster when I wasn't host/slower when I was...but it is better than before.
http://www.myce.com/news/latest-modern-warfare-3-lag-fix-garners-mixed-response-55086/
Later,
Tyson/King Peleus