I'm not going to comment on individual performances, as several people here have given accurate, and intelligent opinions on this matter.
Instead, i am going to talk about the team effort, and more importantly, the mentality.
Granted, this is an extremely small sample to glean any information from, but the mentality of the team is one that I haven't seen since pre-calciopoli, and the style of play is one that I haven't seen since the late 90's- early 2000's.
Juve took the game to Parma. their statement to parma, and hopefully to the rest of the opponents that they will face this year is "we will take the game to you. we are the ones who will dictate the style of play. you have two option. Keep up or go home"
gone are the days, I surely hope, of Juve being a reactionary team on the pitch, reading the flow of the match and then picking their spots to attack. They are now an attacking squad that forces the opposition to adjust, forces the opposition back on their own end of the pitch, and in turn, it will be up to them to try to create something out of nothing.
Juve dominated possesion, their midfield was absolutely dominant, and more importantly, they did this against a team, and these types of teams, that they struggled with last year.