Our son was pretty much completely non-verbal until he was 3 years old. We are really blessed to have wonderful services where we live, and our son began full-time in home therapy at 3. (4 hours a day 5 days a week) In sept he started going to their center 4 days a week and has in home 1 day a week...anyways...one day, his speech path decided to try signing with him. He did everything not to pay attention and not to watch her signs. That night at bedtime, he signed everything she had sign to him that day...helicopter, airplane, car, give etc. I was completely blown away!!! We started using signs with him and it was hard to keep up! He would pick up these signs almost the very first time he saw them. Somehow this visual was the key to unlocking speech for him. For instance if he learned to sign airplane, about 2 weeks later he would learn and know the spoken word, airplane. Now he uses words more often then sign...actually we hardly ever sign at all, unless he needs a reminder for a word. He still has some speech sounds to develop, like s is said through the nose, and pl is said like cl etc. But this technique has been like a miracle. I feel blessed everyday just to hear him say Mommy! That is our experience with asd and learning speech