DH and I have been talking a lot since Sunday about how we should handle this. Fighting the system is so complicated, and we want to do it the right way. What's worse, DD has been having stomach aches and not wanting to go to school. She swears nothing's wrong, but DH and I think differently...

Yes, our school system uses the WISC and SB, depending on the kid's strengths. I have no doubt they would use the WISC on DD. I think it's pretty much their standard test unless a kid shows great visual or mathematical strengths.