xkcd Color Survey Results (2010)
blog.xkcd.com
blog.xkcd.com
Another factor that I wish was covered: makeup usage. I feel that a lot of women are able to distinguish colors because of the experience that comes from using makeup. Go to any store and look at the rouges - you will find every single possible shade of it with a different name. Similar to the anecdote that humans didn't have a word for "blue" until blue dye got common. Would men who use makeup also be able to perceive those individual shades?