For my child with normal PSI and WMI, it's a difference of effort and repetition necessary for learning. Although abstract thought and incredible insight comes pretty easily, computation, reading and spelling have required effort and learning over time.
Interesting. I think we're all talking about the same kinds of things, although my DS8 "got" multiplication right away. Still, he is slow with computation whether addition, subtraction, multiplication or division. My impression was that it was "boring" to him, so he didn't bother to learn it. My opinion is that comprehension is so easy for most things that he has/had an aversion to "work." Computation is work. Watching the science channel and having advanced discussions about nuclear physics (I made that part up) is fun. But I also find that basic math facts go out of his head without constant repetition. Same thing for parts of speech. He can figure it all out when he has to, but he pretty much just zones out when doing it. Next time he's asked to identify the adverb he'll just say "huh," until he remembers oh yeah, that's the one that ... And that's the problem I found he had in school. The stuff that didn't interest him or was hard put him on autopilot and the teachers saw good enough and that was good enough for them. Now that we're on our own, he's engaged, learning and doing, and I'm seeing improvement b/c he's actually doing the work, and for the most part concentrating when he does. Is it practice makes perfect or something else? I have no clue...