[kddani]

Make up your mind for yourself when you get to campus. What exactly is there to be gained by learning false stereotypes before you meet a single woman? Absolutely nothing besides giving yourself preconceived notions that are going to keep you from making rational, nonjudgmental decisions about what is best for you.

ETA: instead of wondering about stereotypes, the thing you should probably be concerned about right now, at least beginning to think about, is how you can get recs for all the sororities. I'm not going to outline the process here because it's been discussed a billion times in many other threads. But if you're truly concerned about rush, that is something productive that you can begin to get together earlier.