I think it starts by debunking the pre-existing paradigm that real change takes months and years to happen. Real change in ballroom dancing can be achieved in minutes, not hours or years.
I hear the father of the Body School used to say it takes 10 years to get good, 9 years where you make it difficult for yourself, 3 months where you realize it sure can't be that difficult and then you learn to dance. He would then continue to say "how long do you want it to take?" if the student said more than 9 months then he would ask "how many lessons per week" then they would give him a number. He would then say "why don't you send me a check ever week with the total of the lesson price and when you have reached the point that you are ready to learn to dance, call me and we can start the lessons in person."
I think one of the reasons people think it's hard to find a good coach is because they believe real change and improvement cannot happen in 30-minutes. They all believe it takes years. So they listen to one coach who conveniently tells them to practice some technique for a few years and eventually they'll get it. Then they go to another coach that gives them the same time line.
He would also say that when you learn principles your world will change in a moment. He also said to not buy into the 30 year plan as that plan is for the teachers that don't know enough to teach the principles and have people see the deeper meaning of them each time.
If your dancing doesn't drastically change and improve at each lesson, you've got the wrong coach for you.
Totally agree SG