This article is horrible.  It completely contradicts itself.  It clearly shows that autistic children have motor skill defecits while unaffected siblings do not.  Then it states that this points to more proof of genetics.  HUH?  All we have to do is look at the number of professional athletes, prior college athletes with autistic children to know this aspect of autism is NOT genetic.  The data in your own study prove that as well.  Did anyone actually read the article before print?  Besides parents saying "Duh" to another study wasting thousands of dollars to tell us what we already knew, the conclusions are absolutely wrong.