Dan. I live in NY and do fleet repair for the local phone company. 9K miles is UNACCEPTABLE for "normal" wearout of brake linings on a fleet vehicle. We took delivery of new GMC 4500 and 5500 trucks. They go through rear brake pads every 18K or so. Those units will most likely not be purchased again for that main reason.
The use of Bendix Fleet Grade Brake Pads may increase pad life up to say 20% for the cost of rotor life.
I hope your case is the exception and not the rule.
Tommy