Having looked into this on several occasions, a trend for these alleged 'famous stutterers' seems to be that they had childhood/young adult stuttering. 'The famous people who stutter account' seems to be targeted at children rather than adults, to make them feel better about it. I think it kind of shows how stuttering in the 'eye of the public' is seen more as a childhood development disorder than something adults suffer from. With that being said, although most of these famous people accounts are misleading, I think there is much potential for improvement when it comes to stuttering, both psychologically and physically. For me, breathing techniques has been incredibly helpful for example.