Yes I have actually heard of instances where admissions committees disregard applications if scores are below a certain point. For example an admissions officer at BU dental school told me that they do not look at applicants if they have a DAT score below 19. Of course there are exceptions to this ie.(if the student has a 3.8gpa but an 18 they will prob still off an interview). Each school has a certain standard as to what they are looking for but as I said there are always many exceptions and being that d-school has become extremely competative the standards for gpa's and DAT scores have risen.