I think the majority of intimidation is not gender specific, unless the person being intimidated thinks in a particularly gender specific way.
Men that are intimidated by a woman's intellect solely on the basis that they are a smart woman seem to be rather sexist in the first place. I think that is more of a problem with someone having a problem with a woman having her own opinions, and not simply being submissive.
Some people just generally don't like to be told what to think, or to have a viewpoint shoved in their face, but that isn't gender specific.
For me, extremely extroverted women (actually not gender specific) and women that are extremely proficient in body language and analyzing my own are very intimidating.
I don't know if the following is intimidating, but it is certainly annoying as hell: women who think they know what is on my mind based on my body language and limited interaction that really don't know me at all. That probably explains why I find women that are constantly analyzing body language intimidating.
Ultimately, I think an intelligent woman is a beautiful thing, and I highly value it.