Feist showed up to Letterman last week with a Polyphonic Spree-sized posse of indie bigwigs, including members of the National, Grizzly Bear, and New Pornographers. The ensuing debate’s branded the white-clad chorus a “We Are The Hipster-World” gimmick, a heart-warming show of community, and a harbinger of “the day ‘indie rock’ jumped the shark.”