My son tested 4 pts higher (FSIQ) with meds. Without meds, we tested with Dr. Ruf using SB5. She wanted him unmedicated to see if the ADHD stood out. And yes, it did. He had a hard time concentrating.

He took the Cogat unmedicated too and scored lower than he should have. His best score was the WISC IV on meds. his processing speed on meds was 97% and working memory was still low 70% (if I recall)