Whether this kid has some natural ability or advantage over other kids doesn't really matter, in either case he never gets this good without doing the work. Celebrate the time and effort he put in to reach this level, not how much of a head start he may have had based on natural ability.
It's not really about head starts. Furthermore, I wouldn't be surprised to find out that, while he has certainly put in some time, that it wasn't a particularly stringent regimen of hours a day "woodshedding".
See, this thing that we're calling "natural ability" is really more about the way a particular brain and attached human being works. So, those who have a higher IQ for patterns will have a far easier time grasping and executing musical concepts and have the potential to exceed most peoples ability to learn them with far less study.
Then it's about dexterity. That's different for everyone too. The point of diminishing returns even with all hours of the day devoted to exercise and devotion to training the hands to repeat actions faster and more precisely just isn't the same for everyone.
It's also important to put in a word about imagination. Nothing anyone does musically means anything if the person making the music is doing nothing more than mimicry.
In the end, the notion that everyone has to practice and study for hours a day to achieve musical fluency just doesn't follow my own personal experience. There are people in the world who just have it inside them.
I will tell you a story about a guy I was in high school band with. He started playing sax in grade school and did very well with it. For the last concert before graduating he decided to play the drums because the drummer couldn't figure out how to play the song (I may date myself, but the song was Abracadabra). It took him 5 minutes to figure it out and play it right, and he'd never played drums before. When we got to high school he decided that every semester he would pick up a different instrument. It didn't take him more than a week to get 100% competent with every one he picked up. Now, I'm not saying he was an amazing flute player or an unbelievable french horn player, but he was the best in his section on every instrument. I can also tell you that he wasn't much on practicing. (Unless he was doing it in his sleep at night...) Went on to be accepted to 3 very good music schools, only to decide we should run off and follow the Grateful Dead.
I've met a good few of this same sort of person in my life and they all have this innate ability to make extraordinary music.
"Natural Talent"