So you guys are saying, that if anything Pre-1980 is Classic Rock and anything after it isn't? Then Eric Clapton's repertoire from 1979 is classic rock, while a song he wrote in 1980 isn't? I think of Classic Rock as any music written by an ARTIST AROUND BEFORE 1980. That way it still retains your definition for the most part, but it is somewhat broader. Maybe this explains DJ's reasoning for playing modern Plant songs on Classic Rock radio.