If you look at those photos the only part of the truck that crumpled was the top half (hood and side fenders) which are just thin metal. Notice that the front bumper doesn't look pushed in at all. Like I said I am pretty sure the F-150 is a body on frame design where the solid box frame runs from the front bumper to the rear bumper. I am not sure how much that area can give. Now the area above the frame like the hood can crumple very easily depending on the angle of the accident. I do know that Ford made some changes in this design from the previous model though.

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Profeshenal spellar