Now here's a natural talent I can get behind. I don't know if this kid has any training, but even if he does it can't be much. There's a noticeable difference between his lack of training and Susan Boyle's, not so much because he has a greater natural talent than she does, but because vocal talent does not stagnate without training, it gets worse. It's unfortunate that Susan didn't get training when she was younger, but without it she seems to have developed a habit of pushing too hard and not supporting. This kid, on the other hand, is still young and hasn't had time to build any debilitating habits. He could have a very bright future ahead of him.
The idea of vocal training, btw, is independent of what type of music is being sung. It doesn't matter whether you're singing jazz, opera, or heavy metal, there is vocal training designed for whatever you're trying to do. (Yes, there are vocal coaches who will teach you how to scream properly in hard rock!) Without it you can be fairly good and skate by on natural talent, but it's highly unlikely you'd ever be great, regardless of your chosen style. Don't get training on how to scream properly, for example, and your songs may sound just as good to your audience, but you'll blow your voice out much sooner, have a shorter career, and probably develop vocal nodules.