I am not sticking up for kulahola, but there is some merit in the idea that the less the student is talking the better. We've all been in class where a student's question will lead the class off course for a good hour. An unnecessary question or comment stops progress and stops the flow of ideas. And we've all been mesmorized and inspired by someone's story in church or a moving performance at a concert only to have some kid whisper to us, "What's for dinner?" A lesson should be more than a lesson; it should be an experience. It is like we are giving a lesson in the form of putting on a show, and we should hypnotize them with info/discovering the hidden beauties of the music/foundations of technique and harmony/imagination/etc.
Some teachers call it "lesson planning."

(At least I hope people are still doing that.)
I welcome all questions during lessons/class, of course, and at times even the best teacher is unclear, but I believe the best teaching is teaching that is so clear, no clarification or questions are necessary. There should be a steady flow of info from the teacher's mouth or hands with a steady flow of piano playing from them. They play, I respond. I lead, they play. I will lead them while they are playing. I will pontificate and inspire, then they play or as they play. I review all points many times and ask them questions to ensure that they understand what is going on. I make sure they hear what they are doing, not just going on autopilot. Ideas are freely bounced around, but the goal for the teacher should be to be as clear and lucid so as to not run the risk of a question. It is like a good closing argument in a trial. When a good lawyer is through, there should be no doubt or question in his statements or ideas because he was so convincing.
I've even given lessons where there is no talking from either of us, only playing. They play, I conduct differently or play the passage differently and they play back. It is a fun experiment. Talking is really unnecessary.
We do have a free dialogue about sports or video games or whatever at various times, but I keep this to a minimum.
I remember the best class I ever had: it was graduate level Schenkerian Theory. It was two and a half hours, one class per week, and I think that only about 5 questions were asked during the entire semester. That's five raised hands in four months. This is because he was so clear and organized. And just when you got lost and were tempted to raise your hand, he would review what he said in even clearer terms without anyone even having to ask. Not because he didn't allow questions, but because there was no need to ever ask one. It was two and a half hours of non-stop information. His method taught me a great deal, and I try to use him as a model in my private and classroom teaching.
Kulahola's 'method' is far from my way of doing things and far from teaching in a positive way, but I thought it would be interesting to share my distantly similar beliefs.
Robert Henry