PB,
I have a son who has Asperger's. My experience was that when we got the diagnosis and read up on it, many things made more sense. One of the characteristics is difficulty dealing with a large task list when viewed in its entirety, but a real ability to be focused on a single task.
It can be a difficult condition to diagnose. It took about 9 months of test, analyze that test, take the next test, repeatedly to get my sons diagnosis. I'm not saying that's what happened in this case but it can be a frustrating thing to get an answer to for all involved.
Peace,
Tom