I use wireless fine. I used it for when I hosted my own website, and I use it to play in and host LFS servers, also no lag. Games which are bandwidth heavy, then yes, lag, but a well made game (So not CSS and such, as their net code is designed for networks and not internet) can play on wireless fine.
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My desktop, the fleet is expanding. If only I wasn't lazy, I'd have it finished by now.