Honestly, this type of stuff from dealers gets my blood boiling. If I was even close to her I would offer to change out the brake pads, rotors, or even install a big brake kit. I am sure we can find some Jeep folks here that might be able to help.My wife could do it herself, she used to do that sort of stuff herself until I came along.
If they are using stock parts the brakes should last just as long. If they use cheaper aftermarket parts it is not uncommon for the brakes to wear out sooner.
I would think you could find a fellow Jeeper to help you install a set of the Dynatrac brakes.