I was thinking on the same page as you but realized, if I had been introduced the concept of programming and picking up a project to do at that age I would've done it. I mean, I didn't miss out too much since I started programming when I was 14, but I can't imagine that I wouldn't have had as much interest at the age of 12 as I did when I was 14. I guess it all just matters what kind of environment you are surrounded in at those ages.