I'm assuming you have followed this team for more than a couple of years. With that being said, when have you ever seen this team relaxed, smiling, joking with the media on Thursday's before a playoff game? Never, except for last week, and this week they were smiling and joking on Wednesday, including BB. This team has a quiet confidence about themselves and in a manner in which we haven't seen before by a BB led Patriots team.
Then look at the Ravens; the brash, bold, chest pumping team is suddenly reserved. I think they sense what they are up against and see no reason to poke it. They will come prepared and ready to lay an ass whooping that unfortunately, they are physically unable to give.
Things definitely seem like they are playing out in an alternate universe based on the teams attitude/preperation and dealings with the media for this game.