Aside: I, for one, am extremely disappointed in the iPhone5.
Its WiFi sucks ass, to put it delicately. I just got back from traveling abroad, and when I'm there, I rely heavily on WiFi. My 3GS had no issues; it use to work like a champ. But the iPhone5? Lord! It couldn't hold the signal; it wouldn't log in to the (WPA2) network even though it would see it; etc. etc.
Apple's response so far? Try disable WPA2 and remove all authentication. Really?!?!
And the problem got worse after iOS 6.0.2
After seeing my issues, several friends of mine have decided to hold off upgrading till they're sure the issues are worked out (in iOS 6.1.0?). At least 1 person I know picked the Samsung instead.
Sorry to threadjack.