No he wasn't. Chiellini was far superior. I clearly remember the incredible Zambrotta back pass, and then laughed when Milan signed him.
As for Grosso, I just don't like the guy. I think he is vastly over rated, just like Barzagli and Zaccardo. They played well as a unit in Palermo, but they are befitting of a mid-table club, not a championship caliber team. They have sucked at their respsective clubs ever since. Perhaps Grosso is not utter shit, he may in fact be good, but not good enough for us.