I went back and read some David Eddings, which I remembered liking in early childhood, and was like, "Wow, look at all the adverbs". I think you have to try something like that with, I don't know, Neil Gaiman and Lois McMaster Bujold, before it becomes a good test of the theory.

Actually, now that I think on it, Bujold has many male characters and I've yet to notice a flaw in their masculinity, side-by-side with Cordelia Naismith, the Greatest Mom in the Multiverse. She's also written a gay male viewpoint character at length (Ethan of Athos) but I don't know how accurate that was.