The post pulls this number from an essay Aaron Swartz wrote more than two years ago, based on some comments by Jimmy Wales.
Wikipedia's growth has exploded in the past two years, so today's number would presumably be a lot higher. But Swartz conducted his own study after hearing Jimmy's comments, and his more detailed findings are even more interesting....more
Tzvee's wondered about this. There seems to be a sizable mafia that controls the content in one way or another. This wandering post wonders about the writers of Wikipedia.