"That’s not autism: It’s simply a brainy, introverted boy"
This article describes a very sad problem. If a child actually is autistic, the earlier the child is diagnosed, the better. There are now therapies and interventions that can hugely improve the lives of autistic people (and the people who love them).
But the earlier a child is tested, the higher the probability of false positives, of diagnosing autism that isn't there.