...told us he probably has Sensory Intergration D/O because he is ambidextrous - "not established cerebral dominance".
We were told virtually the same thing when dd13 was 7 by an OT. She, too, was somewhat ambidexterous and used both hands for threading beads in one of the tests the OT gave her. She saw this as pathological and dx her with SPD and dyspraxia based on what seemed to me to be nebulous evidence. All of the testing came out at age equivalent or way above with just one small thing coming out a few months below average for her age. The same scale we had filled out for a psych and which was used to say that she didn't have SPD by the psych was used to say that she did by the OT.
I guess that I've come to the conclusion that there is a lot of overlap btwn SPD symptoms and the overexcitabilities that come with being HG+ and that there is a lot of subjectivity to these types of diagnoses.
Re "leveling out," I'm guessing that a DYS kid isn't going to be "not gifted" in later years. I do think that all scores, IQ included, aren't set in stone and may change over time. If the arguement is that the scores may not be EXACTLY 100% a perfect estimation of his intelligence, sure. If the arguement is that he is actually average, probably not.