I'll share my story. Last month had my rear rotors and pads replaced. Squeaky squeaky after the brakes were completed, very annoying. Took the car back in and they replaced the pads with an aftermarket variety (the originals were OEM). No more squeak.
I'm not sure how or why, all I know is when I press the brake pedal I no longer have that annoying noise coming from the rear of the car.
Business: BMW 328i Coupe
Pleasure: Ducati 1098S