A WebmasterWorld thread discusses webmaster complaints with Google treating the Wikipedia too well. Meaning, the Wikipedia ranks well for so many different keywords.
Often people mock the Wikipedia, because the information sometimes found there is not 100% accurate, since it is maintained by anyone. Of course there is a self-regulating force of the community, but still...
Anyway, I have seen many wiki results in Google. But the bottomline is, does it bother the non-Webmaster? Does it bother your mother (if she isn't a webmaster)? Does it bother the ordinary guy on the street?
Forum discussion at WebmasterWorld.