If she had hit the median head on at 55mph the bags would have blown. But just a glancing blow on the corner like that? Nope. Probably would have done more harm than good to go off. Heck, the driver side headlight is only cracked a bit.
Corner hits almost never blow the bags as it isn't a collision typically going to bring you to a sudden forward stop. That is almost the only time the forward bags should go off is a direct (or near direct) front end hit beyond a certain force that would be above the safety point of the seatbelt.
I get the impression some people want the bags to go off if someone love taps the bumper
![No :no: :no:](/forums/smilies/no.gif)
She should actually be happy they didn't go off, otherwise the repair bills would be so much higher (or the truck possibly even totaled, that looks to be a relatively simple repair job).