I'm sorry. I don't mean to offend. I suppose for me it's just the ol' whistle test, particularly when stacked up against other UA-era compositions like "I'm Not Sayin'", "Spin Spin", "Early Morning Rain", and my personal favourite "Go Go Round". Just a question of taste. But it's also because of how enamoured I am with "Just Like Tom Thumb's Blues" - it's one of my favourite Dylan songs, particularly in its original Highway 61 version, and the set-up of the single invites the comparison. In any case, I try to keep my own opinions in the main daily write-up to a minimum. Thanks for the reminder of why that's a good thing to do.