Child Behaviour: Not In Their Genes?

http://t.co/8F2kGyux5H
This piece from discovery magazine covers new work looking at the DNA roots of the behaviors that result in neurodevelopmental and mental health diagnoses in children. The conclusion, that they found none, is rather discomforting.
The question is: have we been mislead by heritability studies into ignoring environmental determinants e.g. for ASD, or is the inheritance happening in some other way?