@mr_pingu: Not sure. It works for you, and it works for g0r through Kismet apparently (which g0r said uses aircrack-ng as a backend for that?) Apparently it's not displaying for Saturn.

It's possible Saturn's test AP was just in such conditions that his device couldn't pick up the length?

Hence me saying I'd look into it as soon as I could, since if it turns out to be a 'works for me' thing for most people, then great, but I don't want to assume that until either I test myself, or a bunch of people say it works for them.