Dunno, Dick. As I said I am not a blues aficionado but as an example McGuinness Flint's 'When I'm dead and gone' was covered. Tom McGuinness still plays with the Blues Band so there is a tentative connection.

Status Quo play predominatley 12 bar and most (all?) rock and roll is 12 bar so I don't think 12 bar is the main measure of blues.