Not a stealth boast along the lines of 'he's too advanced' etc, I mean he just races through them, must be skim reading or something, not fully taking things in.
e.g. he rattled through 'the Hobbit' in a few days, afterwards I quizzed him on some of the contents, he did OK at being able to describe the major events, but not some of the fine detail [e.g. there are 13 main named dwarves in the book, I asked him to name them, he managed about 2 or 3 names & then started saying things like 'the young twins' or 'the fat one'].
I don't suppose anyone has any tips on how to get him to slow down a bit?