Found this article which seemed to be related to this topic-
Which NFL Quarterbacks Hold The Ball Too Long?
Sep 23, 2009 – 9:10 AM
JJ Cooper BloggerTitle
During many NFL games, and pretty much any Ben Roethlisberger game, you will hear about how many sacks aren't the fault of the offensive line as much as the fault of a quarterback who holds onto the ball for too long.
That's undoubtedly true, but it's also something that is rarely studied. So to get a better idea this year as part of the weekly looks at line play, I'm logging the time the quarterback had for every sack. The time is measured from the snap to the point where the quarterback is first hit (even if the quarterback shrugs off the first hit, it's fair to say that the play has broken down at that point). In general, the average sack occurs around 2.7 to 2.8 seconds after the snap of the ball. Consider that the internal clock a quarterback must have--while the timing can depend somewhat on whether it's a four-man rush or an all-out blitz, in general if a quarterback holds the ball for more than three seconds, he's in trouble. If he gets rid of it in less than 2.5 seconds, he will rarely find himself on his back.
Read the reast of the article here-
http://www.aolnews.com/2009/09/23/which-quarterbacks-hold-the-ball-too-long/
[ Edited by Ronnie49Lott on Sep 28, 2011 at 12:57 PM ]