I agree with failedtaper: I think that people ARE using AVRT every day, all the time, without knowing that they are doing so. After all, Trimpey says himself that all AVRT really is, is a description of how real people really quit, and the majority of people who quit don't avail themselves of treatment or any particular "program" whatsoever.
In fact, even though I am a veteran of both AA and SMART, after learning more about AVRT I am realizing more and more that I did use the technique when I quit drinking, without knowing it. So much of it is just common sense: you make the decision, you stick to it no matter what, you learn to deal with life without alcohol, you move on.