I mean, come on Sean. He can't be trolling! The explanation of things "sucking" is just too solid for that.
What do you mean by this? Most GC games supported 480p, whereas only a few PS2 games did. Some Xbox games supported 720p, but most were only 480p. Games on the PS2 that supported 1080i were usually just upscaled 480p.
If anything it'd be the other way around. Nintendo refused to use the modem they made for the GC (in the US only PSO 1/2 and 3 used it), and the Wii didn't have HDMI ever.