There were some respected testers/experts who felt that gifted cutoffs moved much lower on the SB with the introduction of the SB5. And that is reflected in the hoagies chart.
I asked the gifted specialist tester who tested my girls with the SB5 about whether this and whether it was correct or whether they considered the SB5 and WISC4 to be more directly comparable. While acknowledging that it's just one day, the two systems test slightly different things and a child might be better served by one test or the other, our tester was very clear she considered 145 on the SB5 to be assumed equal to 145 on the WISC4, no more, no less. She and her business partner do not consider a child HG on the SB5 before 140 (possibly 138). I know of only one child this practice has described as EG (FSIQ 150+) and none they have described as PG.
I also find it funny that in Australia we regularly encounter the attitude that SB5 scores mean nothing because "EVERYONE is gifted on the SB" while it seems in the US that people often consider the SB5 a "harder" test than the WISC4...
For what it's worth my kids have only margin of error differences in verbal iq between the SB and wechsler tests(2-3 points), which I think can be entirely attributed to liking the SB tester better and so being more verbally responsive. They both do better on the non verbal in the SB, I don't know why, that I assume is a family quirk. The SB5 is of course much less diagnostic with regard to working memory/processing type issues.
