Yep. And the deletionists where more often the "majority" culture and male, which resulted in a feedback loop for the nonminority and female. New minority turn up, have a bad experience and leaves. I think it was studied let me see if I can find the paper. I know the results were replicated with comment bots.
Update, not the ones I was thinking of but a good read. HBS Cases: How Wikipedia Works (or Doesn't) http://hbswk.hbs.edu/pdf/item/5605.pdf