I went through an autism assessment about a year ago. Part of that was getting an IQ test. I scored well in Verbal Comprehension and Perceptual Reasoning, but struggled more in Processing Speed. This was accounted for by giving two scores, the Full Scale IQ, and the General Ability Index (GAI). The GAI deemphasizes the processing speed, as raw speed to an answer usually isn't that important these days. I was told the having a larger gap between these numbers is one indication that autism might be in the picture.