Exactly as Irena says-- and just note that sometimes our kids wind up with.... well, the Russian figure-skating judge, for lack of a better way of putting that.

Also worth noting is that a skill versus EF
gap may be APPARENT in HG children until quite late in adolescence-- in part this is because the asynchronous development is most striking in this pair of domains. That is, they give the IMPRESSION of being older, and if anything, many of them have barely age-appropriate EF that are slower to develop.
I gather that ultimately this is a developmental
thing with HG+ people, and it's not indicative of ADD/ADHD necessarily. We're seeing our DD's EF catching up ONLY NOW. She's 14, and her EF is hovering between what would be appropriate for 13-18yo, roughly. Varies depending upon the day, truthfully. She also finds it a lot harder to stay attentive when the work/task is too easy.