TBH, mine are a little squeaky sometimes - when dry.
I dont hear it very often - just happens now and again, and seems to be when I am very lightly applying the brakes to come to a slow stop. Even then, the squek isnt very loud, but you can just hear it.
Oh, and Im only on 5,500 miles in my car!
Not sure if its a warranty job, since brakes/tyres etc arent usually covered by warranty.