I could be wrong, but I don't think the F-150 has the same sort of crumple zones you are thinking about on a car. Trucks like that usually have solid steel frames that run the length of the vehicle. F-150's typically don't crumple like our Bimmers do, so to see that sort of damage to the F-150 surprised me a little.
...and by the way Blue, A) It was a woman driving the F-150 not a guy and B) you can' even compare the safety of an F-150 to an X5. Not even close. The X5 IS much safer (and better).