Sorry this is long.
I was 150% against Greek life and was shocked when DD said last summer that she might rush in her freshman year. She is so not a typical sorority girl, imo. I convinced her to wait until either her second semester of freshman year or her sophomore year. She actually listened to me and waited!
DD made a great group of core friends (none in Greek life) her first semester and most will end up being lifelong friends. She also got involved in so many other things (honors, intramural sports, volunteering, two different clubs) so I was beyond shocked when she told us over Christmas that she was going to rush in the spring. I just didn't get it. She had plenty of friends and was very active and loving college. Why did she need a sorority?
She did say she was so happy she waited because it gave her an entire semester to get to know the different sororities. She knew the one she wanted and if she couldn't get in, she was okay with it. She got a bid on the first day so it wasn't even a very stressful process for her.
I have softened in time and am now only 90% anti-Greek life!

Honestly, it really depends on the college. Her school does NOT have houses and I think that makes all the difference. She spends her time with these girls making crafts and doing philanthropy work. They are not the party going, hooking up, mean girl types I was envisioning. If DD wants to party, she does it with her core group of friends.

I'm honestly just shocked at how "innocent" the sorority life is, at least at DD's college. They are downright boring if you ask me!
As for the mean girl persona, DD told me she met a girl this fall who was the reason people have such a bad impression of sororities. She had her little posse of mean girl friends and is just a rotten person. While that small group did irritate DD, like she said, she also knows groups on campus who are just like that who aren't in a sorority. You will always find those people all over in life.
DD is very happy. She said it was her goal to be extremely involved with as much as possible during her college years and the sorority is part of that plan. Greek life is far from her entire life.
One thing I did tell her before she rushed was that being turned downed was going to be absolutely heartbreaking for her generation. I'm sure it was tough in my day, but as someone mentioned, I didn't live in a time when everyone was a winner. We tried to raise our kids in the same way, but it is tough when society goes against your plan. When her softball team (5 y/o) lost every single game, they ended up with a trophy that was taller than most of the kids! Rejection is never easy, but I really do think it is harder for this generation.
I really think college is what you make of it. A sorority shouldn't make or break your experience or define you.