That is a terrible way to view older students. I know several 20-somethings who got their DVM then practiced for 5-10 years before deciding to do something else more compatible with raising a family. Others switch to part-time or go into teaching. Not to mention those that get into vet school and then decide its not for them. There are pros and cons to any age, but there are other criteria that better predict an applicant's ability to succeed and contribute to the profession.