Thoughtful post. You obviously went through a major breakthrough here. I would concur with the other person that this isn't exactly passive no matter what angle you approach it from, and you do need some kind of discipline and commitment to get going. But I can certainly see the passiveness in the sense of the fluent speech that comes out, and the fact that the habit of letting thoughts go probably gets more instinctive the more you do it. Also the fact that you're not meant to be focusing on stuttering and just living your life is pretty cool and not what you'd typically hear. But even if you arrived at the holy grail of stuttering treatments, which you very may well have, unfortunately not everyone can immediately take their share. I think in its raw form, this method just wouldn't work for everybody. Like telling people with anxiety to go and meditate, you may see a spectrum of results. To be fair is any treatment - medicinal or psychological- ever truly 100% effective? But the essence of the approach is certainly something that could be played around with and moulded for different people.