Well I´ve had a moderate/severe stutter and after one intensive Stuttering Program I was 1 year without a single stutter event. Including talking in front of many many people. But I was talking a little slower than a normal person and been using a technigue. But well ok, for other persons it is not 100% I was an exception thats true. But 98%+ is achievable (that means 1 stutter event per day, or per week, or per month, depends). But now, 6 years after the program, living in another country, speaking another language, experiencing daily work-stress may speech become worse and worse and now it is extreme severe. In August I am going to take apart on one very good stuttering program, imo the best in the world, at least I couldnt find anything better and its long term success is scientificly proven (how many programs can say this?). I´ve met many people who are X years after the program and their speech was perfect. I asked one of them (he had moderate/severe stutter before) if he had some bad stuttering event in the last 3 years and he said no. ​ But in USA in might be different. I am talking about Germany. But Hey, this program is going to USA in the few years, there will be soon a documentary released :)