From
http://www.conservapedia.com/Dinosaur
"Polls show that about twice as many Americans identify themselves as
"conservative" compared with "liberal", and that ratio has been
increasing for two decades.[1] But on Wikipedia, about three times as
many editors identify themselves as "liberal" compared with
"conservative".[2] That suggests Wikipedia is six times more liberal
than the American public. "
Yeah, that's how statistics work :)