First I don't want this to turn into an MD/DO thing. Please, please don't.
I recently interviewed at DMU and CCOM. I also interviewed at Drexel and Wisconsin Madison. The DO interviews were very casual. The reps promoted their school and I was asked common questions about my application and why DO. The MD interviews were much different. The reps were cold, short, and condescending. They basically kept saying their school was the best. The interview questions were also condescending.
What gives? I felt they could have gotten the information they wanted and gathered my ability to communicate without being complete d*cks. Do stress interviews actually give the schools useful information?