For us, the numbers and the labels helped get needed educational services. I really don't think it's possible to distinguish too much at the 99.9 tails. That's why you may see many people here talking about their HG+ kiddo. Once you're beyond HG, you are likely to share at least some traits/issues with the kids at the ++ as well. If you took 100 kids who scored 99.9, there would be 100 different profiles and 100 different learning styles. IMO, what is important when you notice you've got a kid who is at the extremes is to do your best as a parent to try to find a peer group for your kiddo (even if just once a year), find the best educational options that work for your kiddo and your family, and above all be flexible.
Note - The Davidson Institute's Young Scholar Program describes the population they serve as profoundly gifted. If you look just at IQ, some of their accepted scores fall below what some charts list as PG. But they do not look at just IQ scores, but achievement and/or portfolio as well. It is hard to define, and within the PG population is a wide range of kids with a wide range of needs.
Last edited by st pauli girl; 11/21/12 09:09 AM.