Is it just me, or is it girls in sororities mainly date guys in fraternities?

[BlackAdam06]

I noticed this trend back in the day when I was undergrad, and it appears to be the same way these days. I say this because I visited my old campus the other day, and overheard one of my neo's saying he hates dating girls in sororities because he noticed that most of them only date guys in either:

A) A specific frat or
B) In a frat period.

Which lead the both of us to somewhat believe that if brothas aren't affiliated with someone's frat, alot of these sistas "probably" wouldn't even know you existed, much less give you the time of day because you're not in the "right" circle. I know speaking as a guy, we could care less if a girl is affiliated or not, but for some reason, it appears (And I stress appears) that our female counterparts, tend to date along the greek lines exclusively, well, at least a lot of them tend to from what I see. Am I just imagining this or what? What do you guys think?