Do smart women make better wives?
But women generally do not marry down on the intelligence scale. The social convention is for women to be in a position in which they can look up to their husbands. Many apply that in a literal fashion and seek a taller husband, but they also seek someone who has other qualities that allow them to look up to them. Hence the social convention of older husbands and younger wives that many are now seeking to try to break as a solution to the shidduch crisis. (Interestingly, though, in the past the difference in age could be far greater. For example, my maternal grandfather was 10 years older than my grandmother; she was only 18 when she married. And on a recent visit to the art museum, the tour guide pointed out couples with 13 years and even 30 years between them -- the latter was a second marriage for the painter Rubens.)
A blogger brought up his own predilection for intelligence in a woman at http://walkingthegreyline.blogspot.com/2010/01/intelligence-in-shidduch-prospect.html.
It sounds like such is considered an unusual request. I know of all the misogynistic anecdotes about wives making cake rather than getting involved in Torah. But you know, this is one case where you can have the Torah and eat homemade cake, too.