Could my son have Pervasive Development Disorder?

In my previous post, a lady mentioned PDD or Pervasive Development Disorder. I had never heard of it before. My son just turned 2, he doesn't speak. He has poor cognitive skills, doesn't do shapes, stack blocks, that sort of thing. He was essed with a program called SoonerStart because of my concerns with him not speaking and was told he should score a 50 or below to p but scored a 120, which is the level of an 11 mo old. He wouldn't stack the blocks but banged them together. He wouldn't turn the bottle to get the cheerio out that the lady gave him to try and he got mad because he couldn't. He kicks the wall and doors constantly, twirls around, is hard to get to sleep, is corrected but doesn't seem to understand. Doesn't like books. He seems to be very smart at some things but the minor things like 'pick up a specific toy when asked" he just looks at us and doesn't seem to understand what we are pointing at. Could he have this PDD or mild autism as its often called? Anyone have