Hi,
I'm a first year at USC. I just wanted to clarify that there is not a 95% acceptance rate. For the class of 2013, approximately 600 were interviewed. We were not told how many were accepted, but I know it is nowhere near 95%. From my interview, I kept in touch with a few other applicants...2 out of 5 were accepted.
Interview process at USC:
information sessions about USC, PBL, financial aid, etc.
tour of the dental school
lunch with upperclassmen
mock PBL session - not stressful at all see my other post above
writing sample - very simple..takes about 10 minutes
The interview is focused on selling USC to the applicant as well as making sure that you understand what PBL is and that it is a major part of the curriculum. USC doesn't interview a huge percentage of its' applicants...so basically, you have already impressed USC. During the interview day, you need to figure out whether USC would be a good fit for you...and the interviewers will try to do the same.
I hope this helped and feel free to ask me any questions!