I've noticed a lot of the players from that period have that sort of mentality. If I remember correctly Carr and Rozehnal both made some pretty bitter comments on leaving, Owen is always making thinkly-veiled jibes on twitter, Duff you mentioned, and obviously there was Abdoulaye Faye's celebration. Not to mention Parker having a go at the fans. There was a real victim mentality amongst that set of players.
He has since said a lot of good things about us to Cabaye though.