I think the game we should look at is the Chargers Ravens game from 12/18. The Chargers are about as close to the Pats offense that the ravens faced all year. And the Chargers blew them out! Two things stick out from that game:
1.) The Chargers got up early and the Ravens were lost after that. They picked off Flacco on consequtive drives.
2.) in the 4th quarter, with the Chargers up, they went on an all run 9 minute drive that ended in a FG and took up pretty much all of the 4th quarter.
The Ravens scored their 2nd TD in garbage time. Much like Denver, the Ravens are built to play with the lead or in a very close game. If the Pats don't turn the ball over, they should get ahead, and once ahead, they should not have to look back.
The ravens also have two very ugly losses this year, at Seattle and at Jacksonville. Those are teams that they should have beaten (and if they did, this game would be in Baltimore).
Let face it, the Ravens play in a division where they have to face the Steelers granted and they did beat them twice and once quite handely. BUT they also have the Bunguls and Cleveland, They played the AFC South and the NFC West this year, not exactly a killer schedule. Rivers was the best QB they faced, and he killed them.