Wired is much better to stop lag because of the fact that here is no Interference. Let me explain: When you are wired it goes directly from your router to your Xbox/PS3. When you are using wireless it goes from your router to your wireless router, which converts it into radio waves. Then it goes through the air, which has tons of interference, such as TV and regular radio waves. After that it gets to our wireless receiver, which then converts it back into data that your console can recieve, and then finally goes to your console. All of that takes time, therefore resulting in lag. With wired, none of that happens, so no lag.