This is utter bullshit.
Where do get the data that shows pickup drivers tailgate? That's nonsense.
And whether the bumpers meet or not is irrelevant. What saves your life in an accident is crumple zones increasing the delta t of the impact. Bumpers after 5 mph do nothing. You want to lengthen the time of the impact in order to decrease the negative acceleration which decreases the force of the accident.
Of all the stunt drivers I have witnessed while driving on the highways, not one has been in a pickup truck. They are usually high performance cars, sedans, tuners that go blowing by me at 200 km/hr like I was standing still. Never a pickup truck. I would wager that if you looked at collision data you'd find that pickup trucks as a whole are the least likely to get in a collision.