I could be totally off, but IIRC Skytrax relies in part on public online voting (http://www.worldairlineawards.com/main/mthds.htm) unlike say, CN Traveler. I suppose that theoretically means the click of some 14-year old kid from a certain Internet forum (hint: starts with air and rhymes with whiners.net) counts as much as Mr Solitaire PPS.

Oh, and being SIN based, I'm obviously biased towards SQ (but for good reason, I like to think.)