i am pretty sure it affects ur skill alot. i notice that when i use the famas and i have a bad connection it takes two bursts but when i am host or have a good connection it only takes one. also if u have good connection you can dodge knivers, u can actually knife people, people see me when i see them, when i shoot i dont have a delay with my bullets firing out of my gun. goood connections make or break a game, wish mw2 had servers