And I'll argue for as long as it takes, anyone who lived through the period knows fully that at the time if you wanted rock and roll you followed The Rolling Stones, ( although they didn't start out as such they went on to become the greatest rock and roll band in the World), if you wanted pop you followed The Beatles. The former of course were seen as five minute wonders, the latter got torn apart by jealousy and a Japanese so called artist
As an aside your statement that rock and roll is making a come back in Canada leads me to conclude that you obviously don't venture very far from home, every time I visited the Canadian town of Banff there were plenty of local rock and roll bands playing in the pubs, great times