A LOT of it has to do with the euro's self entitlement as better fans and crowds in general. I have been to a ton of shows in the USA, and the seating structure definitely doesn't help the cause, but from the second the lights go off everyone stands/dances/shouts at the top of their lungs until the show is over. I remember a video from last tour in europe where jon and richie were playing never say goodbye on the circle, and the video was just everyone around them yapping and you could barely even hear jon and richie. Those "disinterested" fans are everywhere.