Great psychologist, long waiting list

My son Mathew has ADHD and our family doctor referred us to Dr. Shenfield. I hung up the phone when receptionist told me that her waiting list for therapy is over 4 months. We decided to go to another child therapist but after a few sessions it was clear that it's not working. Then our doctor told us again that Dr. Shenfield is one of the best in Toronto, so my wife insisted that we wait for her. I think it was about 5 months before Mathew started his treatment and now, two years later, we can see really big changes in him. Dr. Shenfield is very experienced and clearly very good with kids: Mathew loves her and thinks of her as a family. Yet, I wish we started earlier and didn't have to wait for so long. She only works 3 days a week, if she worked for 5 days like the most of us, there probably wouldn't be a waiting list there...