I have been testing out the online with a few friends, 4 in game at one time with some 1v1 and 3FFA games. It dosnt matter which one of us hosts or how many people are in game we have lag coming out the wazoo. We have been playing through ICO, but we actually get a smoother game with less lag if we play on hamachi . 

I dont think its out internet speeds/ping cos when we use hamachi it runs fine, its only when we go on ICO that we get lag.

Is there something we are missing setup wise or some sort of issue with ICO?