I think that if Andy Reid decides that Cassel is the guy for this season, that the fans MAY give him the benefit of the doubt but will want to see some SERIOUS results in order to support another year in '14. Cassel DID have a really good season in NE and then another good year in '10. He may get another year of fan support if Reid can do a good job selling him to the fans.
****This is NOT a Cassel endorsement!!!*****