DS (4.7) was diagnosed at 2.5 with classic autism. He showed most of the symptoms if not all at that time and thereafter. In fact, not until recently we had any reason to doubt the diagnosis although it was clear to us at the time of diagnosis that it was not classic autism, if anything it was HFA. Recently since DS turned 4, things have taken a dramatic turn. His speech progressed to the level of a 3.6 years old from 18 months in the space of couple of months. Suddenly from last week he is able to answer questions about the past. He has suddenly become social, behaviour changed, eating everything for the last 6/7 months (he only used to eat yogurt). He still have speech delay and he is still behind from his peers. In the last 2 months, his ABA therapist changed his programme 5 times as he was suddenly gettiing all the concepts in one go. Now the people involved with him (all the professionals plus school) saying-it's speech delay, not autism. Has any of you experienced this? Have your DC suddenly recovered from autism?