Interesting notion, and one I first heard advanced, with great bitterness, by a woman friend in the mid-1980s. She held that American rock & roll, a thriving native species, had been fatally tainted and finally overwhelmed by the Brits, beginning with the Beatles, and that even later variants mistaken for home-grown strains (e.g., the "San Francisco" sound) were merely induced mutations. She wasn't a cultural Luddite, exactly--she listened to the current tunes--but her first loyalty was to the vanished doo-wop era, and she always held that a proper rock & roll song should include a saxophone track.
cordially,