This put me in mind of the part in Miles' autobiography when he tells Bill Evans what he has to do to, uh, get into the band.
Weren't Lennon & McCartney on record as hating jazz? Although (as someone else pointed out on another listserv) what they "hated" may have been 1950s British trad jazz... not something I'm terribly fond of myself. Whatever Copeland's sincerity or insincerity, it is true that jazz was no longer a music of rebellion by the time he was growing up--at least in most quarters. Something pivoted between 1954, when you have Brando's motorcycle gang snapping their fingers to bop on the jukebox in THE WILD ONE, and 1956, when you have jazz represented as a snobby, elitist, egghead music in JAILHOUSE ROCK (not to mention BLACKBOARD JUNGLE's infamous jazz-record-trashing scene).