Actually I think many people here can relate to the low working memory and the high achievement scores. It sounds like you might want to look into outside testing. Maybe the school tester is just really sick right now, but if the situation is stressing your dc out and the tester is telling you that there may be 2E issues... Well then you might want to find someone who specializes in gifted and LD to test your child. Since a private tester is often going to have a wait before they can meet with your child, you culd always set it up and cancel if the school psych starts being more responsive.
Have you done any reading about Working Memory? Does any of it jive with your experiences with dc? James Webb and Ed Amend have a book, Misdiagnosis And Dual Diagnoses Of Gifted Children And Adults, that might be a good place to start.
