Bobby Hebert, AKA The Cajun Cannon, does a sports show for WWL in New Orleans. Bobby may do his show half-plastered sometimes, but he's right on the money at times.
He quoted stats one night on drive killers. Holding was the worst culprit, especially on second and long (more than 7 yards) or third and long. If you aren't in the red zone, your chances of scoring a TD on that drive fall to the basement. Even in the red zone, you're much, much more likely to walk away with only three points.