Many of us die hard Flyer's fans were so long before the Devils arrived up north.
I think a lot of South Jersey's loyalty to the Philly teams has more to do with TV then actual location. The Philly networks have the broadcast rights to SJ so we grew up on the Eagles,Phillies,Sixers and Flyers and not the Giants/Jets, Mets/Yankees, Islander/Rangers or Knicks/Nets.