In Don's defence, in his Manchester show he did play Sunset Grill, which I noticed he didn't play in his previous show at Glasgow. Don is such a perfectionist though that his idea of 'spontaneous' might be a bit different from everyone else's! My guess is that he might have a fixed list of songs which he always wants to play and others which move into and out of the setlist depending on how he feels that night. Either way, I think it will be interesting to see how much this changes for the rest of his US shows.