Considering what we have written lately about the New York Giants offensive line and the Pro Football Focus Pass Blocking efficiency ratings it would follow logically that the Giants line would not fare well when graded as a whole.
In this case, logic would prevail. In the PFF Offensive Line Rankings for 2011 the Giants placed 31st in the 32-team NFL. The Giants were 13th in 2010.
"Yes, they won the Super Bowl, but they did so in spite of a line that sieved pressure throughout the year. Our lowest-ranked pass protecting line had problems all over, but nowhere as bad as at the tackle positions (especially once Will Beatty was lost for the year). It wasn't just the tackles however, with every member of the Giants' line earning a negative grade. This explains the drop-off in the run game and makes the season that Eli Manning had all the more remarkable."
PFF ranked the Giants 24th in the league in run blocking and last in the league in pass blocking. For comparison's sake, Football Outsiders ranks the Giants 28th in run blocking and sixth in pass blocking. The pass blocking difference is likely in how 'Outsiders' views pressures, as well as giving Eli Manning credit for escapability in the pocket.