Why is this controversial?
Anyone who's worked with children can tell you that some of them are gifted beyond their peers in certain areas. Two of my children could talk amazingly early, and (surprise!) as adults they are great at public speaking, with no training and little experience. Myself, when I was a child I could easily do my brother's math several grade levels above my own, because it seemed to me to be obvious extensions of what I already knew. If I got stuck, my brother only had to show me once. That's not normal. (Why do you think we have grade levels?) I became a physicist. Is anyone surprised? Other children are unusually athletic, or musical, or empathetic, or imaginative, or energetic, or daring, etc., etc., etc. Find the right tests, and you'll prove these are innate characteristics, with a wide range of innate ability. This only upsets people because of our prejudice towards certain abilities (the ones that make money).