Huge, this is the point I was trying to make. Sometimes I don't make it clear.
Look at the top four Pro Scrambling Quarterbacks
Not in any order
Donovan McNabb, Steve McNair, Michael Vick, Dante Culpepper
All these quarterbacks are great players and a welcome addition to any team. But quarterbacks who tend to "roam" around the field, seem to have more injuries than those that stay in the pocket.
McNabb and McNair have played almost every game for the past three to four years with some sort of injury. Vick has had a different injury every week this season. Culpepper, I'm not sure about his health.
My point is that teams are taking a huge risk by drafting a quarterback who likes to run. They tend to make an immediate impact, then slowly start to slip.
Personally, I love to watch scrambling qbs. You have to understand that for 4 years, I had to watch Casey Clausen pretend like he had any more footspeed than the offensive line at the University of Tennessee.
Most Quarterbacks who stay in the pocket are very accurate, and those that tend to roll out make the defense come up and just throw it over their heads, and are usually less accurate but have good arm strength.
All the great Quarterbacks seemed to stay in the pocket most of the time.
My English teacher last year was Buz Morrow, you may know him from his playing days as a DE at Ole Miss. All year, I heard these great stories about his roommate, Archie Manning. One day in class we convinced him to let us watch his old game film.
We watched Archie pick apart the #1 team in the country like 31 to nothing.
We watched 4 or 5 different games. I noticed that Archie was patient, staying behind his blockers, then placing the ball where the receiver could get it.
Defense's are starting to figure out how to stop these scrambling Quarterbacks, their putting one or two Linebackers in a spy, virtually eliminating the Quarterback from busting long runs.
Please don't think that I consider myself an authority on this or anything else, this is just my opinion.