Hi!
I have some friends at USC and recently applied to grad school there. I will tell you that I do not have enough personal information to be able to tell you every last thing about Tri Delta at USC. Though, from what my friends have said, they're really "Delta Delta Delta this....Delta Delta Delta that..." they always walk around in letters and stuff. I didn't perceive that my friends meant the comment to be either good or bad. So, what that comment says to me is that Tri Delta is very visible on campus. I've never heard anything bad about the Tri Delta chapter there.
With that said, the entire Greek system is very visible on campus at SC. The Greek students are *very* involved. When I've been there, I've noticed that the Greek students tend to hang out together a LOT. Very tight knit community. My friend Eddie was Phi Sig there and I know that there was *always* something happening on Greek row.
My advice to you is to go and check out the chapter. If nothing else, just go to say hello to your sisters! Though it's sponsored by the IFC men, there is a really good Greek Life website at USC...go check it out!
http://www.usc.edu/dept/ifc/
Because of the tight knit community feel, you may find that you regret having gone alum. Just go meet the ladies and decide then!
Good luck! (and Go Trojans!!! wooo!!)
......Kelly