Ha that is a great vid. It was such a contrast to see a mini kid playing a large guitar. And so well too, props to dah kid!!
But to answer your question, not really. Sometimes people come along that are just plain incredible no matter how well you put it. It would be like comparing yourself to a musical savant. Why is it that a person with a savant mind can do such an amazing feat? Maybe we will never know. I saw a program in which a musical savant that could literally play anything on the piano, in any mood, feel, rhythym, so long as he had HEARD it first.
Now as for a (in what this case looks to be) completely normal child playing so well, it could simply be that prodigies of all sorts are born more often than we would think. Maybe as that kid is playing swing, his neighbor's six-year-old is figuring out the next big think in physics, or math, or alternative energies.