Meh, beats me.
But I did attend USC for my undergraduate years.
I didn't like USC's dental school. I was in the Delta Delta Sigma Pre-Dental Honor Club, and I got to shadow one instructor in the oral surgery department.
He wasn't very friendly to me. Some of the dental students had this stuck-up "I'm superior than thou" attitude which I also didn't like.
Plus USC's curriculum is based on case studies. If you like that style of learning, then go for it. Otherwise, you should look elsewhere for dental school.