There's some writers over at Hot Air that ask the perennial question (it must be a slow news day): Marriage, drinking or military service. Who counts as an adult?
I did all three, starting at about age 19. Actually, I started drinking at about age 18, went to Army Basic at age 18, and got married at age 19. It was a rite of passage, and many of my high-shcool calssmates went to DaNang on their senior trip.
Asking questions like this is pointless. I know lots of people who, at age 30, shouldn't be counted as adults.