If it is the brakes, and it could be, you might have a pad that is hanging up slightly due to a sticky caliper slide pin. It could also be anything that keeps the pad from moving back to an at rest postition. It never does move back very much and always maintains a slight touch on the rotor. Another posibility is an edge on the rotor that didn't get machined off (not likely if they machined the rotors). Sometimes it helps to champher or bevel the edges on the brake pad.
If it were me, I would take the pads off and inspect for proper lubrication and installation and I would champher the edges before reinstalling them.
Proper lubrication often sets an average brake job apart from an excellent one. It means that the caliper slide pins must be lubricated and checked to make sure that they slide freely. It also means that the pad backing plate should be lubricated at every point that it touches the the caliper, especially including any points that the pad backing plate is expeted to slide as the pad wears. Any grease that is specifically made for disc brakes should be fine.
In the final analysis, some brake noise really is a normal fact of life. Some brake pad materials are more prone to noise than others. I would still try to do all you can to get rid of the noise before writing it off as normal.
