While Juice can explain it in detail, it does not surprise me.
It would guess the budget truck was a large box truck with a high door/lift. Judging by the height of the damage, the impact line appears above the bumper. Note the radiator/grille and hood.
If you hit a vehicle, barrier or obstruction at the bumper line that is one thing. Hitting something higher or lower and/or at an angle, the damage can be remarkably worse.
I would guess the airbag did not deploy based on speed and/or collision was not at the sensor location.
There is nothing like a love tap anymore. My neighbor in a minivan rear ended a full sized SUV at 8 mph and his front was totally wasted. The SUV only had a scratch on the bumper. Go figure.