When I told him there was no way my son had an IQ of 92, he got defensive and said, "Are you really going to challenge me and question my results?"
Danger, Will Robinson!
This is just the hugest of red flags for me, both professionally and personally. If a practitioner cannot stand being questioned, they're putting way too much of their own ego into the situation to remain competently professional.
My other thought-- and forgive me, I haven't read ahead so it may be answered already-- is whether it's necessary to use the WISC-R. If you have suspected auditory processing issues, why not a non-verbal test like Raven's? Or if you're dealing with a kid who is already assumed to be gifted, the old Stanford-Binet still has considerable value in determining precisely
how gifted it is that we're looking at.