Psychologist Simon Baron-Cohen and his colleagues at Cambridge's Autism Research Centre have created the Autism-Spectrum Quotient, or AQ, as a measure of the extent of autistic traits in adults. In the first major trial using the test, the average score in the control group was 16.4. Eighty percent of those diagnosed with autism or a related disorder scored 32 or higher.
I scored a 21, but I'd be really curious to see how someone else (say, The Wife) would score me.
Update: Turns out I score a 24 with The Wife answering for me. I'll take it.