I try to keep it narrow- intellectually gifted by definition means attaining a certain score on an IQ test. 130+ seems to be the US public school standard.

Is there a discernible difference between a child with a result of 128 and another with a result of 130- I doubt it. There are probably major differences between a child at 128 and another at 150. Mine is in between the 128 and the 150, and I will need to advocate for his education. However, he's not so out of sync that traditional school doesn't work- which is what I think parents of pg kids are facing.