VERY laid back.
kinda dumb though that when I went they had a 'shortage' of interviewers and so there were some professors interviewing us who normally don't interview students. FOR EXAMPLE, my interview was no more than 8 minutes! He didn't ask me 'why dentistry' or about my grades.
asked me about my research and my dental office job. then said, so, now you ask me questions.
i thought that was kind of stupid. the school should've at least made an attempt to try to find out more about who i am, instead of judging me SIMPLY on my gpa and dat (i have a low gpa, good dat).