uscalumni,
My impression is that most of the students considering ATP are actually closer to late twenties to mid-thirties.
Take some time to go back and read all of the posts in the ATP forum and it will become clear that you are largely looking at a more mature group.
There are a few current instructors for ATP that post regularly in this forum, so they may be able to give you more up-to-date specifics.
I am 32.
Regards,
Scott