((laurie))) Maybe you said and i missed it. If you did I am sorry. Does your son have a iep at school? If your Dr wants the school to do a whole work up on your son. And you can ask for that ,.The school has 30 days to do so once the dr has asked for it. imo
WIth a learning disablity the differnce is how they can read and write on paper verus
being asked the questions and responding. Thats for a LD label. Which as you said there is a reading and writing isssue.
Here is a link for autism.
hope it helps. My son has LD and PDD .
http://autism.about.com/od/whatisautism/a/symptoms.htm

muffy