I think Pirlo might be the problem at this point because if he has not created some leadership already he never will. When a coach is no longer in control of what happens in the locker room that might be a problem.
You need to remember, In serie-A, Juventus also still unbeaten from the match day 1. I'm also not sure with Pirlo from the beginning, but as mentioned by @hd49728, Juventus is the only one with 10 goal concededd till week 12.
Parma has been a tough opponent for Juve, historically speaking. If they do not get three points there they can forget about serie A.
I think no, they still have a chance, because there still 25 match after vs Parma, Juventus still can take the lead from Milan or Inter. The points gap with Milan only 4 points. The competition more interesting now, because, Milan underpressure, and Pirlo now proofing of his capability as potential coach in the future.
Next match. Milan will face Sassuolo, one of team that become a night mare for Milan, I think in this match, Milan will be struggling to get 3 points. Inter face Spezia, maybe we will se Inter on capolista.