The pressure isn't off (all the playoffs teams have it) but the pressure of the undefeated regular season and all the records, etc. is.
I can't even really explain it, but even as a fan, I was feeling it and then after the Giants game, I felt elated and relieved. I didn't really expect that. I can't even imagine what the team was feeling. It had to be a real emotional high.
Which is why a loss would have been awful. It would have been so deflating. THere were some theories about how it would have pissed the Pats off, etc. and motivated them to win the SB. Well, maybe they still would have won the SB, but a loss would NOT have helped them. A loss is poor motivation, unless it occurred, say, last year in the AFCCG.