Although Pittsburgh doesn't throw the ball that often, they are one of the most efficient passing teams in the league, meaning they can move the ball through the air. If we look at first downs completed vs. pass attempts, you find the teams rank like so:
The Falcons ranked 19th in that category, which basically means our passing offense is pretty average in terms of efficiency. All 6 AFC playoff reps ranked in the Top 10 in this category, while 3 NFC reps: Bucs (18), Giants (22), and Bears (31) ranked poorly.
This stat doesn't mean a lot when indicating who will win games since the Colts (#1) and Bengals (#3) were highly ranked and lost in their first playoff games. But it does show that Pittsburgh is very capable when they do throw it, so I suspect if a team is able to thwart the run/pass ratio stat trend, Pittsburgh is capable.
"Vincere scis, Hannibal, victoria uti nescis" -- Maharbal, 216 B.C.E.