The first article I read (here from Sky News Australia) said,
"Almost half of US children diagnosed with autism spectrum disorder (ASD) wander away from safe places, and about half go missing long enough to alarm their parents, a new study has found." (OK- firstly, ANY period of time is long enough to alarm me if my child suddenly vanishes, but we'll let that one go).
It went on to quote
"'Children who were reported as missing were older, more likely to have experienced skill loss and less likely to respond to their name. They were also more likely to have lower intellectual and communication scores than non-missing children,' Law wrote."
I have an issue with this sort of reporting. You might think it is pedantic of me, but I feel that reporting like this just reinforces the stereotype that Autism equals dumb. In so many cases, this is just not true. Being unable to communicate in socially conventional ways does not mean a person has lower intellectual capacity.

My daughter "wanders". Her IQ has been assessed to be in the high range of what is considered normal. Her recent speech pathology report states that her receptive and expressive language are both in the high range of what is considered normal. She is Autistic. She has Sensory Processing Disorder. When she becomes anxious or experiences sensory overload she disappears for a while. If you didn't know her and you found her in her hiding spot she would likely behave in a way that you would find challenging. She probably wouldn't speak to you. She likely wouldn't respond to her name. She may try to hit or kick you. This does not mean she is not as smart as you!
We need to be so careful with our assumptions and with the stereotypes we choose to accept and perpetuate. Realising that the label my children have been given can act to cause misunderstanding in others about who they are makes me more aware of the misconceptions I must hold about others. And that is truly a challenging thought.