If there are heated wars over a topic, with factions constantly making changes... well damn, that tells you a lot right there. So long as the changes are documented and the history available... that's a very good thing. I learn more in the comments of places like slashdot, reddit and google+ than I do in the original post or argument. often quite a bit more.
Same applies to wikipedia. If mr Alpha says one thing and Mr. Beta says another thing... and you see a whole string of alpha and beta modifications... well then. I guess you've got to use a little deductive reasoning and personal judgement...
All I know for sure... is if I query "what is...." and I look at the list of results.. my favorite first choice is wikipedia.
Just like every time you see an article knocking google... you have to check and see if facebook paid for it, seeing as how they got caught doing it....
Any article knocking Wikipedia, a reader has to consider whether its a real complaint or yet another top down knowledge distributor annoyed at bottom up methods ruining their business model.