I love your response to this Cricket2

I suspect too there is a significant range of variability once you reach those high end scores. I know half a dozen kids that sit around 145 - 150 fsiq - all of whom have completely different skill sets, levels of academic motivation etc. One, a 9 yo, is fascinated by maths and working 7 years ahead, another 9yo (same scores) loves history and reads university history texts for a hobby, but is only working a few years a head in maths, has no interest in science. Yet another is cruising along with a single grade skip, but is very focused on competitive swimming. Another has had achievement testing showing they are capable of working at least 5 years ahead across the board, but they have no academic motivation whatsoever. All of which I guess makes me wonder whether there is any real meaning to 'profoundly gifted' anyway.
I completely understand the need to differentiate between different levels of giftedness, but once you reach a certain point it seems it becomes a bit meaningless - which is why I like HG+ too.