If all of that is true, then how do you explain Flacco's 57.6% completion rate, which ranked 26th in the NFL this year - behind Rex Grossman and Kevin Kolb, two guys who are very unlikely to be starting next year? Same goes for his 24th-ranked 6.66 yards per pass attempt, and the TD:INT ratio.
Even if you say that is not Flacco but other factors (receivers, coaches, etc.) causing those low rankings, the 2011 Ravens passing game is still the same regardless.
Before you respond by saying he'll have a career day because of the Patriots pass defense, I'll preemptively say that team yardage stats are relatively meaningless. Of the top ten "officially' (i.e., by yardage) ranked defenses, five made the playoffs and five did not - which are the identical numbers for the bottom ten defenses based on yardage!
One stat that has been proven to matter is turnovers though. The Ravens defense forced 26 turnovers; the Pats defense forced 34 turnovers. On offense the Ravens turned the ball over 24 times; the Pats turned the ball over 17 times.
Can the Ravens win? Absolutely; only a fool or a blind homer would think otherwise. From before the season began Baltimore was considered by most to be the team most likely to stand in the way of a return to the Super Bowl for the Patriots, and the season has proven that prediction to be valid. It's a very compelling matchup and should be a great game.
However I don't see why one would think that Flacco will have as good a game as Brady will unless it is wishful thinking brought on by blind homerism.