MTV did them a pretty big disservice last night by only allowing them 3 minutes for a nearly 5 minute song. To me their performance last night seemed a bit forced.
I agree, they are incredible live.
I'm not entirely sure you can blame MTV though. Im going to guess they got given 3 minutes and it was them/label etc that chose to do a radio edit style version of the song. Or they could have chose to do a song like house of gold which is just about 3 mins. Who knows though.