Oooh aah! Don't shoot the messenger I was only quoting!!
The article actually says (Just re-read, original post a bit rushed) that it jumped at the point in Evil Leaper III: Revenge where Sam goes completely out of character and against all his morals to shoot Zoey and 'Blow the biatch away'.
They also say that the themetune change contributed, and Blood Moon and Dr.Ruth were absolute pap, but altogether it picked up on the last episodes, and the finale was very good apart from the lack of closure.