It wouldn't make sense for "U" to stand for "über-burger", not if the owner knows something about german. "über" is not pronounced as "oo-ber". Because of the dots above the "u", über has a softer sound than a regular u, foreign to english (as far as I know). For the right way to say "über", see: http://www.forvo.com/word/%C3%BCber/ Still, very good burgers that are worth calling über! Although a german would call them "ober", rather than über ;) Eat on!