I question the method of this "study". I don't think it's a leap to say 40 undergrads writing in their journals is anecdote.
Just because sociologists do it, doesn't necessarily mean it's the right thing to do.
I guess I just don't find any of the insights in this article particular compelling or new. We do have a gender problem, but I don't think bs studies like this lend any credibility to the issue.
If you can't spend the effort to get any kind of reasonable sample, your work doesn't carry any weight.