Speech is not one of the defining characteristics of autism but lack of eye contact, aloofness and unflexability are a few.
Check out this linkhttp://www.autism-society.org/site/Page ... hatis_char
I've had several friends who's kids didn't speak until after three and then they started telling stories!
If something is wrong, you'll know, I promise.
I am one of those parents.....my 3 year old now interrupts MY story telling but at 2 years he was not talking, not making eye contact and had gone mute as in NO sound at all, not to mention he lined up everything in the house, in order. He didn't sleep much, and threw his head backwards all the time. It had gotten eerie, and EYE suspected autism not they............followed my gut, took my son to a Occupational therapist and speech therapist. The speech lady recommended tests and we did all the hearing tests. All clear. I knew my son could hear, because eerily every time a plane flew over, he would go brrrrrrrrrrrrrrrrrrrrrr.......then the Occupational therapist spent an hour with us, told us he is NOT autistic, very independent, there is an obvious delay of speech and it was good I followed my 'mommy meter'. The Occupational therapist gave us some tips, like being animated,( which I am always)so I did it more. The speech therapist had also mentioned, that a rocking motion, is good for the boy. He did have a rocking horse and we went to the park daily, but then I began focusing on play as therapy. So took the kid on slides twice a day, made sure he was on the rocking horse as much as possible, massaged his gums, and believe me it helped. Thing is, he was already doing those things, we just became conscious of certain motions calmed him.
To answer your question, my son did shake out of it, on his own. I am glad that he did, but if he hadn't, then at least, we had done all the tests and we would have begun treatment at an earlier stage and age.