The Daily Dish | By Andrew Sullivan (January 05, 2009) - The Wiki Core: Kudos to Jimmy Wales for raising a cool $6 million to keep Wikipedia ad-free (what ads? - ed.) This made me chuckle:
Wikipedia bills itself as the free online encyclopedia anyone can edit. And while indeed that is true, do you ever wonder who does the bulk of the work? ... Wales decided to run a simple study to find out: he counted who made the most edits to the site. 'I expected to find something like an 80-20 rule: 80% of the work being done by 20% of the users, just because that seems to come up a lot. But it's actually much, much tighter than that: it turns out over 50% of all the edits are done by just .7% of the users … 524 people. … And in fact the most active 2%, which is 1400 people, have done 73.4% of all the edits.'