False. Rock's inventors were pre-baby boomers born in the 20s and 30s -- Chuck Berry (1926), Elvis Presley (1935), Buddy Holly (1935). Even the 2nd generation (mostly from the "British invasion") were pre-baby boomers born in the War years.
1936, actually. ....and then there's Lennon ('40), Dylan ('41), McCartney ('42), Hendrix ('42), Jagger ('43), Richards ('43), Robertson ('43), Waters ('43). ......not one baby boomer in the bunch.