Thank you ebeth for the link - very helpful!
snowgirl: I think I've failed to articulate the situation clearly. My son was referred to the Neuropsychologist to be tested for suspected Aspergers and/or LD. The IQ score variations was simply more confirmation that he was likely still having Sensory Dysfunction issues including fine and gross motor skill impairments. There are many neurotypical children with sensory issues just as there is also a significant sensory component within Asperger's Syndrome.
I realize that some people believe Aspergers is an overused label much like ADHD without much to back it up. This isn't the case with my son. His challenges are significant - his characteristics are classic. He's been seen by experts in the field including psychologists, behavioral experts, occupational therapists and physical therapists (for help with the damage caused by 12 years of walking on his tip toes - classic ASD trait) As much as I wish it was otherwise - there's no doubt that the diagnosis is correct. If you put your 3 children in a room with my son I assure you the differences would be great.
http://www.autism-help.org/comorbid-sensory-integration-dysfunction.htm
