Guest,
I regard myself as an avid Dylan fan, and much as I'd love to say that I've seen him give a great performance, I have to be honest and say that I haven't. In fact, I'm currently 3-0 in that respect. Nothwithstanding the fact that he is Bob Dylan, I wouldn't offer him a gig at my local folk club on the basis of what I've seen.
That said, I know that he can give powerful live performances. Enough people have testified to that down the years.