"That's a shame. As a former group facilitator on the adolescent unit of an inpatient psychiatric/chemical dependency facility I witnessed many successes. In almost every case it was the parents willingness to open up about their own dysfunctional childhoods as well as their troubled children's that made the difference."
Bingo.
The quotation from the article shows only that the author makes claims that are irresponsible and self-serving. The author just puts forth something most people would like to believe, but it is unsupported by any scientific research.