Well, I think LOGs are in play here, too. Not just denial.
A child counting 1-to-1 at age 1 is more likely to be HG+ (though not definitely HG+) than the child who can do it at age 3. But both are doing it early, and both are probably some level of GT.
DS4 is a pretty mathy kid, but he still has to think hard about subtraction. Addition he's had down since he was 3 or 3.5, and he initiates addition problems much more regularly. But subtraction still isn't easy for him and he doesn't initiate that nearly as often. They're doing no real subtraction in his pre-K; it's tackled in late K to early 1st grade at our public school.
OTOH, DS7 had mastered simple subtraction by age 3, and I think well before. I never really knew when he got it--he was just doing it one day. That tendency made it rather hard to know what he was doing when. If he saw it once, he usually knew how to do it.
I feel like my two kids--one clearly HG+ and one probably MG/MG with LD/ND (?) is helping me to see the difference between ND (or at least MG) and HG+.
Oh, and thanks for the correction about the 50%. Since we never had a problem, I guess I remembered wrongly. Sorry!
But I do stand by my statement that kids develop physically at different times, and it pays to be patient if the dr. says that's okay to do.
