I agree completely with Bart's analysis of the fight and did notice how Kellerman went from saying that Joe was like a washed up Trinidad, to making excuses for Jones, once the tide turned.
If they fought when both were in their prime, there is little reason to think that Calzaghe would not have won.
Emanuel Steward has always been objective when covering fights and made the point of saying that neither fighter had ever faced anyone this quick before, but that Joe's strength has always been his ability to adapt mid-fight and find a way to win.