Interesting points lads, and its your flatulant comments about the Band, Kyle , that brought to my mind the earlier debate about sincerety in music, and at the risk of being boring, I wonder if the whole live music debates sums up similarly.... that A) Pop bands in particular playing the same songs over and over again must sap all emotional integrity out of the music leaving it dead or "insincere"..
B) Seeing many live shows-- we all have experienced the somewhat rare event of a pop band giving its fuckin all (think arcade fire lees palace) .....and then some... but I bet next year it would not be as fresh for them or us.
C) Jazz artists have an extra chance at it because of the variations and independant experimentation which constantly evolves and changes there live shows nightly.