Don't you just love, boys!
Mag, you're right. I guess it's simply human nature. For what it's worth, I don't think it's envy that drives it. I think it's pragmatism on the part of most parents.
Many of us have children who are deemed exceptional in certain areas. For me, it's vocabulary and expression. I have a child, not yet three, who comes up with quite amazing verbal concepts, both factual and emotional. It has been possible to have an approximation of an adult conversation with him since he was about 2.2.
But now, nearly three, he can't pedal a bike, he can't shit in the toilet. In fact, there are loads of things he can't do that I've seen other boys of his age do with ease. But the other boys that can do those things, don't talk the way my ds does.
Swings and roundabouts. Exceptionally gifted children/people are rare. They certainly don't account for 10% of the population, as the government would have us believe.