People with autism dont understand social norms or rules like normal people. Autistics are unable to learn from observation. They need to be taught the significance and meaning of a frown as a pose to a smile, or how to focus on the person that is talking to them. Autism is easily confused with low intelligence, but many children with autism are in fact very smart. Autistics can learn and improve their education and behavior, and this allows some of them to function as close to normal if not equal in society although most still need assistance with living and job skills throughout adulthood.
Every autistic child is unique.
Not all therapies are universal. Each one has to be tailored for the specific patient. People with autism like a very structured environment. They like consistency in their surroundings. A savant is a person who incredibly excels in a particular area, such as music or math.