Some of the British groups---most notably the Beatles and Rolling Stones---were recording in 1962 or 1963. I wonder why US radio didn't play them
then? Anyway, I've heard many people say that American rock'n'roll might have died out if the "British invasion" hadn't happened. A year that saw top-ten hits by the Angels, Miracles, Kingsmen, Impressions, Chiffons, Drifters, Surfaris, Beach Boys, Four Seasons, Dion, Jackie Wilson, Jimmy Gilmer, Jan & Dean, Randy & the Rainbows, Martha & the Vandellas, Peter Paul & Mary, Lesley Gore and Stevie Wonder certainly didn't make
me think rock'n'roll was dying. (You'll notice I omitted Elvis Presley's name. That's because I don't want anyone bringing up
Bossa Nova Baby. 
)