The purpose of Wikipedia is to approach consensus, not truth.
I guess. This kind of critique gets pretty old. The whole point of moving away from "THE TRUTH" was to suggest that no one editing on wikipedia has access to "THE TRUTH". I'm not an expert. You're not an expert. Sure, we probably have our areas of expertise, but they aren't verifiable in a pseudonymous editing environment. In the absence of that verification, we have to trust references, not people. If I say "believe me, this is THE TRUTH", the right response is "Wikipedia isn't interested in THE TRUTH, do you have a source for that."
It's cute to twist that around, but neither you nor I are Steven Colbert. We won't make it anywhere near as funny. To misread it to think "Oh, wikipedia is only interested in groupthink" is to miss the point. Lots of so called experts come on wikipedia and demand that people listen to them on the basis of their alleged expertise. When people (rightly) refuse to listen to them, those people storm off to /., their blog, or their cat and declare that Wikipedia is only interested in groupthink. Lots of time groupthink does grip wikipedia--just like any other organization. People see comments from editors they know and trust and respond accordingly. New people are often distrusted. These aren't features unique (or even uniquely salient) to wikipedia. They are features found in any community, large or small. Conflating the existence of groupthink with some underlying community desire> to govern through groupthink is inaccurate.
Really, we don't mind the truth, so long as it has a little blue superscripted number after it.