I wonder what the M:F ratio of the name "Alex" is. I agree that it's not really gender specific, but I only know 1 "Alexandria", and she doesn't go by "Alex". This could be a function of my university (70:30 M:F), or it could be generational (I'm in my 20's). As a result, I tend to default to male.

Perhaps different demographics respond better to different names, based on their preconceived notions of class and status. Does a really exotic name change anything?