On: Fred Wilson: The Age Question (Why younger founders have an advantage)

I don't know about percentages, but I would bet that when I was in junior high, students who learned programming took it much more seriously than students who do today.

This is what students used to read in junior high/high school:

http://www.csbruce.com/~csbruce/cbm/transactor/

Depends on when you were in junior high school:

http://en.wikipedia.org/wiki/Creative_Computing