There’s more evidence that an increased number of neural connections is associated with autism. One wishes these researchers understood network theory better, because then they would understand that increased neural connections cause positive feedback; and if they understood positive feedback, they would then understand autistic behaviors a great deal better.
Also, children under the age of two have a great many more neural connections than do children older than two. That’s because, at around two, there is massive neural pruning, including of connections and cells themselves. May it be that autistics are essentially neurologically two years old? Or, sometimes, younger?
There is an evolutionary process called neoteny, which may go a ways toward explaining what is happening with the emergence of autism in the human population. It has been theorized that humans are neotenous apes. That is, we retain infant traits while sexually maturing. There’s a great deal of evidence for this, from the turn of toes to the slant of our vaginas to the angle of the neck entering the skull and the flatness of our faces. Could it be that autism is another neotenous step?