Perhaps tangential, but the 2015 world champion of public speaking Mohammed Qahtani actually has a really severe stutter. I got the chance to work with him, and

Perhaps tangential, but the 2015 world champion of public speaking Mohammed Qahtani actually has a really severe stutter. I got the chance to work with him, and he stuttered since he was a child, and still does, severely, during normal chat and workshops and so on, but as soon as he's on stage and he's "on" it disappears.