No it isnt, we are talking about MUSICAL INFLUENCE, not cultural influence or anything like that, influencing record companys and radio stations to play certain kinRAB of music isnt musical influence, because they didnt influence the actual music, they just influence the way the music is marketed...To have some kind of musical influence with any real significence, you have to influence actual musicians first.
As long as i can remeraber, no pop punk band has actualy called Good Charlotte a influence.