I didn't need the lecture on networks either. I've been using them for over a decade.
Also, let's be honest here - if Microsoft had used b or g wireless, nerds would complain that they weren't using n technology. I guess it's simply a matter of using the most current standard, and - perhaps significantly - a newer standard than the PS3's.

I'm also not sure Microsoft is trying to gull consumers into thinking it's going to improve their experience of online play at all, but rather just talking up their new gear.