"Alphabetical privilege", nice. As someone who's surname starts with AB I would also call it "alphabetical curse".
E.g. back when I was young when teachers would describe what to do then often would call each pupil up alphabetically to do it, and I was always first, and most of time had not actually listened to the instructions...
I think you are right (although I now wish I had not abandoned my old account). However, I have always felt that karma systems are too biased towards old users who had more time to accumulate karma. If only the karma system had some "aging" of results built in, like the tennis ranking system.
And I am only partially saying that because I have a new account here.