Epidemic, or awareness?
Here's some evidence supporting the idea that the increase in autism diagnoses is just that — an increase in diagnoses, not an increase in incidence. Increases in autism diagnosis aren't evenly spread around the country. There are hotspots. Researchers found that kids who move into these hotspots — even after an age where autism might have been normally diagnosed — have a higher likelihood of being diagnosed with autism than kids to didn't. It suggests that awareness and resources might play a big role in rates of autism diagnosis
. (Via Micah Allen)