Hahaha... you're kidding, right?
At orientation, my class was told we were "a young class and would need to be watched carefully"

...average age in my class is like 24.5. As another anecdote, when we had our first preceptorship meeting, I counted the people in my group. Some 80% could have been classified as "non-trad" and about 20% were straight out of college. I would estimate that approximately 50-75% of my peers have worked in healthcare in a paid position after college prior to applying to medical school.
You can't tell me their level of experience is identical to the kid that came here right out of UG. You also can't tell me "26" is on the old side for an entering med student. It's
slightly above the mean of ~25. The people in my class that I would legitimately call non-trad would be the 30+ crowd, of which we only have a few. When it comes to people who really "stick out," the married with children criterion is probably more important than is age, although I know at least at my school, we mesh very well. I have guy friends in my class who are married and have a kid, but we still hang out. It's really no difference 'cept they have add'l responsibilities back home.