It's not a source at all. It should be designed as a guide to sources - one that will allow you to get accurate information about both official statistics and wacky conspiracy theories (which are as important to be accurate in discussing as anything else.) Instead it prefers to be a voice of God, egotistical narcissistic middle-class Western elites, intelligence agencies, and any random manipulator who wants to juice up some stock.
edit: the people trying to get the truth stated plainly (whatever that is to them) into Wikipedia require exactly the same skills as the people who are trying to get consciously deceptive information into Wikipedia. The problem with Wikipedia is that it is a pseudo-government built out of Confucianist aphorisms rather than rules, so instead of being directed by reason, it is ultimately directed by authority. Authority comes from strength, not justice or truth.