@Andy If you looks at the top users by reputation (who tend to be top users because they're active, but I'm not going to take out inactive ones for this discussion - I doubt there's a bias toward or away from any place in any case) and chase down where they're from where I can, then for the first page it's roughly: US: 1/3, Eur/UK/Russia: 1/3, Aus/NZ: 1/6, Other+Unknown: 1/6