At the weekend I had to use my xbox that is upstairs and it has a wireless connection. The lag was a hole lot worse I kept disconnecting I had lag buying in shops and getting thing out of storage. which I don't get down stairs with a wired connection. I hardly ever disconnect with a wired connection and the only lag I get is delayed damage when in battle. I didn't think it would make that much difference but it did. Hope this helps some of you with really bad lag connecting via a wired connection should make a big difference. I know a lot of you mite already know this but it mite help those who don't.