FWIW, DS6 was tested with the WISC. It did manage to capture some of the abilities that I was seeing. FSIQ was DYS range, with GAI about a standard deviation above (which is very, very close in overall reasoning abilities to his more verbal sister). To be fair, DS has more "verbal" strength than I gave him credit for - he qualified for the use of extended norms in the VERBAL section (just lower than his more extreme-verbal sister). Apparently, I am a poor judge of verbal ability, because I was comparing my quieter DS to my super-verbal DD. Overall, he has a more even profile than his sister (he is higher than her on PRI), but their FSIQ/GAIs are freakishly similar.
We will do achievement testing. It is very helpful to hear the experiences of others here with either the WIAT or the WJ.
