Front Disk Rotors

[Larso]

Took the Mondeo in for its 45k service today and got the expected phone call early afternoon that something out of the ordinary needed to be done.( almost picked the right time half hour out ) Front rotors under size $600+ to replace. Quizzed about that happening at 45k and should it be done under warranty and was met with 40- 45k sounds about right. I didn't do it as I wanted to investigate further and I don't have any issues with the brakes whatsoever. I am sure i can get it done it cheaper, but does this sound right?