Well, I was impressed, but I do take the point made by Leadfingers, He'll need to either start vocalising or get with someone who can. It was more that his potential seems very impressive. To have developed that rather unique sound at such an early age is a bit special. And apparently he did it himself, without tuition.

He can always back it off a bit when he does more mature material.

Oh, and it's Lukas-with-a-K, apparently, sorry about that.