The Open XML process is a great case study why Wikipedia is not always reliable, when money comes into play. Even before the heated phases of the Open XML discussions at ISO a scandal rocked the Wikipedia scene. Rick Jelliffe disclosed in his blog that he was offered money by a company to edit the Open XML article. At that is exactly how this article looks until this very day, a honeypot for young wikipedians who want to watch the dirty tricks.
Throughout the controversial phases the editing process demonstrated a clear bias of professional editors towards a certain corporate agenda and pushed the Open XML article towards a "shadow article" as a target, close to advertisement. So regardless what was changed by the 'ordinary guys' would be reversed, step by step.
Now the Open XML controversy is gone. We have to understand that a lot of money is at stake. Consider that the Council could save 50 Million Pounds by shifting to ODF and open source. And that is just a tiny example.