Not 10 year old ace web programmers, but I have a friend who started coding PHP at age 10 and was doing serious freelance work (making as much as any other seasoned PHP dev) in high school.

Definitely not the same, but getting started at 10 and being proficient at 14 isn't unheard of.

All I know is that you'll never miss them. They always like to point out how young they are when sharing anything.