The studies mentioned there give figures close to 2:1 when comparing men vs. women; quite believable, when considering my personal experience and accounting for what is undoubtedly a skewed sample.
The gender difference on Etsy being discussed is well in excess of 10:1. That's a 5x difference in the best case. I stand by my original statement.
Entirely possible, and I don't know if it's been replicated since the 1996 study; it was noteworthy because it was one of the very few studies that found a large gender effect. If that study is flawed, it further reinforces my main point, which is that there are very few general innate or cultural gender differences are large enough to explain the 10:1 or whatever ratio among Etsy users.