Well done.
Listen, all this brake stuff is mostly nonsense. Brake squeel is common across all cars and is EASILY rectified. I am afraid it has been blown out of all proportion because the average Audi dealer/repair shop are not mechanics or technicians, they are just monkeys driven by what the computer tells them to do. Audi are no better by allowing the situation to fester, but they are only interested in selling new cars so maybe understandable.
I do not want to get into a technical dialogue on brakes as it is such a subjective subject with opinions running wild. All I will say is that brake squeel is 99.9% due to the pads moving in their cage that is easily cured by fitting a marque that has tighter tolerances (maybe Redstuff), using 3m shims and brake paste (not copper grease) around the edges. As for warped discs, well outside of serious, and I mean serious racing, this just does not happen!
And if you do get a squeel or judder problem, do not panic and run around fighting Audi on warranties, simply find someone who knows brakes and has a reputation for getting them right. Leave the car with him or her for a day and I guarantee you all be be sorted. Or, if you want - take a trip to the south of France and I will do it for you! Happy new year RS3ing!