However he seems to jump around from interest to interest. It's not like he is reading Les Miserables or calculating super advanced math problems in his head. He just seems to really get stuff and master it after a very short time.
So I am curious the accuracy of a score like his.
There seems to be a split orientation where some gifted kids are more depth focused and some are more breadth unfocused. That curiousity and wide range of interests combined with the ability to pick up new things quickly is not a "normal" kid trait. Particularly not in the extreme like my DS6 (and myself) and sounds like yours may be.