I'm going to post this without reading the posts (unusual for me) because I can well imagine what they say.
My experience and expertise in this matter is that I come from an area where there is a very large Mennonite population and I was a school board trustee for 6 years in this area. Our board has two schools set up primarily for Mennonites and most of the Mennonites in our region are educated through grade 8. It took me a long time to come to terms with this since it's so against my own beliefs but.....
Mennonite children are "schooled" in a great number of things past the time they leave school. The people in my area are very astute business people, amazing farm families, kind and helpful in our entire community. The Mennonite kids in our schools are as happy / bratty / funny / sports minded / sad / depressed / NORMAL as the non-Mennonite kids are.
Our Old order Mennonites are the ones who leave school in grade 8 and who choose to live a plain life. There are many Mennonites who are living just as everyone else is. The Mennonites on Dr. Phil are old order.
Understanding this religion means understanding how they choose to live "plain" and also how their religion impacts every aspect of their lives. It also means understanding that it is a choice. I know many people who chose not to follow the religion but I know many more who are happy in its stricture.
In my experience, it's a faith that just wouldn't work for me as it seems to have a bias against women but I've had long and interesting arguments with Mennonite women who disagree. I know strong, happy women who are comfortable with both their faith and their way of life and I know some very unhappy women who left the faith because it just didn't work for them.
Calling this a cult does a real disservice to the long and deep foundations this religion has had in both Canada and the United States. Mennonites have been an integral part of my own community since 1837. This is a very legitimate faith and it's one which benefits any community lucky to have a strong Mennonite culture. Our Mennonite organizations are involved in aid to both the community and international relief.
Seeing the girls dressed as they are is very ordinary to me, they look just like the kids who drive their buggies around my neighborhood so I was able to watch without that coloring my view. I have to say, they are as articulate, bright and aware of their own feelings as anyone I've seen at that age. Their father seems to be a caring person who chose to do things the wrong way.
Mennonites don't brainwash their kids and the children I know of this faith are welcome to speak their mind, they just tend to do it a little more politely than our children do. They also speak English a bit more carefully because many learn an old German language at home. Many of the children who start with our school board (often not until grade 1) speak little English. I'm hoping that viewers of this show are able to look past the religious trappings of the Mennonite faith and just listen to the girls.