Well, pretty much every multiplatform game is available on the X360, so I'm sure that doesn't come in the way. Plus, he may have his personal biases when it comes to certain genres, but I don't think he's ever gone out of the way to praise an X360 exclusive. For example, if he was biased towards the X360, he'd have lauded Gears of War: Judgement to no end. But he didn't seem to like it much, based on his impressions.
DarkLord is one of the more active mods, and being the most active gaming section, general gaming needs all the help it can get. So, yeah, adding him to the existing list of General Gaming mods is a great idea. Will definitely bring it to the admin's attention.