What to do if professor comments on candidate's age in an admissions interview?
Are you sure you're not reading too much into this? It seems to me like all he was doing was quoting a stat. More often than not, it's industry and not an academic field, that tends to discriminate (sometimes without even realizing it!) based on age. I have to agree with one of the responders though that the professor was treading on thin ice, and in retrospect, he probably wishes he hadn't!