It has got to be mental/overall toughness right? This is one of the tougher editions of the Patriots that I can remember. I know after every win fans can't wait to compare this team to one of the previous Superbowl winners but this group has really been impressive. How many teams could have the entire left side of their offensive line wiped out and still rally from 17 points down at the half? I believe a similar circumstance just ruined the Packers perfect season attempt. Not to mention that they have been at times starting their 3rd/4th string center and rookie RTs. They only have 1 opening day starter in their defensive backfield currently playing and 2 of their best D linemen are castoffs and 2 others are a 7th round pick and a an undrafted free agent. This team certainly has some warts but as a fan its really nice to know no matter the situation this team will not roll over. I don't know if they'll win the Super Bowl but I do know the 2009 playoffs will not be repeated by this group.