Agreed that the fan base has changed, but does that really make them a jam band? They don’t really have any control of who comes to their shows. They do play a lot of covers and improvise a bit, but I still wouldn’t call them a jam band. I guess it all comes down to how you define the jam genre. When I think of jam bands I think of a bunch of needless guitar noodling with weak original material and an overall lack of structure. I do agree that bands are now largely defined by their audience, which I think is a little unfair to their music.