Gamespot is one of the worst sites when it comes to bias, which is one of the reasons I don't go there much anymore. It all started with the "graphics comparison" between the 360 and the PS3 for me, and I lost all faith in them completely.
I'm not sure what their stance on the Wii is, tbh, since I haven't really been there much the last year or so, but I do know that they act as if PC gaming is dead (like most sites of the same kind...).