That number is probably increasing due to all the text messaging and cell phone distraction going on.
I'd guess that safer cars are just barely managing to outpace the increased danger from increasing distractions.
If IDPA wanted to actually mimic the typical experience of a concealed carrier there wouldn't be any shooting at all. I think anything that makes you think and move with a gun in your hand is a definite plus.
Two excellent videos that touch on this topic: Competition vs. Self Defense
and Special Interview with Massad Ayoob