Check out this video (at 4:15), where Tony Robbins claims that he makes someone who stutters fluent after 20 years of stuttering! We have all experienced spontaneous fluency, that goes away very quickly. In my opinion, Tony engages in irresponsible marketing.
Tony is inspirational, in general, but he should stick to change the possible and not the impossible. Tony's mission is to change other people's lives, maybe we as a community should change Tony's life and increase his understanding of stuttering. Stuttering is not a learned behaviour; it is an adaptation of a brain that is prone to jamming due to neurobiological issues.
As he is coming to England with this video in 2013, the BSA might be able to report him to the I-cant-remember-the-name agency for irresponsible marketing. NOTE: Maybe we can find this guy called Waschad (spelling?) and get him to "say" a few words. I doubt he is still fluent.