Sarah Bronson from Jerusalem, Israel wrote (on facebook):
I wouldn't use the words "valid" or "legitimate." But yes, it is true - Dr. Sylvia Barack Fishman, a sociologist of contemporary Judaism at Brandeis has
written about this extensively - that the more involved women and girls have gotten in Progressive movements of Judaism, the more the men have left. You'll notice that in those movements, almost all the leaders are women, because men lose interest in leading a "woman's" world. Once it's not a boys' club, religion loses its appeal. I don't want to label that as "valid" or "legitimate," just the reality of what does, in truth, actually happen.
Lawrence Szenes-Strauss from Brandeis:
The most interesting part of this article is that the author rejects the standard Orthodox apologetic about women having a distinct role and a special holiness of their own. If equalizing men's and women's roles denigrates men but not women, then the original state must have been one in which men had the superior role. In the author's mind, Orthodox Judaism is unabashedly about men being better and more important than women. I would be interested to see a more thoughtful Orthodox response to this.
http://blogs.timesofisrael.com/feminisms-pyrrhic-victory-a-reply-to-sara-liben/