It's sooooo hard to differentiate certain things at 2. No matter, he's certainly gifted. I w az s confused if my son had Aspergers or not at that age...and that's what I for a living! Beyond imaginary play (and i've had kids with Aspy who pretend play for hours upon hours in their area of interest), I would be keeping track of things like hypersensitivity, ability to tolerate frustration, flexibility, and repetetive movements (hand shaking, finger flapping, rocking....even for very short periods pf time) to discuss with the
neurospych.
Not trying to stress you out. As I said before, my DS was a numbers/letters kid, reading at age 2. He has never been a toy kid..and at 5 he clearly does not have ASD, but it took awhile for his imagination and social skills with same-aged peers to catch up to reading and math interest.