> Gifted children are "gifted" with a laser focus on the unusual things that they find fun - math, music, what-have-you. They spend countless hours playing with numbers or with music, while little Johnny is playing with a ball.

Doesn't really match my experience of gifted children, many of which are not gifted "with a laser focus" on anything, and perform very well at things that they don't spend additional time on.

> But it boils down to the hours that kids put into their interests.

It pretty clearly does not; people don't get the same results out of putting the same hours into the same things.