I agree with the others that there are probably a bunch of HD women in your wife's circle, who don't talk about it. After all, what woman wants to admit that she wants it more, gets rejected and all the rest...it must mean she is a nag or fat, right?
I don't think your wife is going to be convinced by anecdotal evidence. It sounds like the two of you are communicating a little better now with counseling. Do you think she might be willing to read SSM with a more open mind now? If I think of any more suggestions, I'll post again.