In the case of some of my kids, they have a language processing issue that interferes with the testing, so their IQ scores generally, and VCI specifically, tend to be lower than their achievement scores, often by one or two or even three standard deviations.
It sounds like the situation for your son would be different, because his verbal score was high.
FWIW, my understanding is that the Cogat is worthless for any kid who is even remotely 2E or just has a slower processing speed.
I don't understand why WISC scores would not be acceptable, no matter who performed the testing. One option might be to take the WISC privately in your new state.
just my two cents
