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Feel the rotor cold and see how much difference is there between the outer edge of the flat surface of the rotor (the area not contacted by the pads) and the middle of the flat area where the pads contact? That should tell you how old the rotors are. A dealer would measure both with a caliper and compare to the Porsche supplied tolerances .
It would be unusual for the rotors not to have been changed at least once in 88k miles. Mine were changed at 42k.
Any record of half-shaft rubber boots being replaced? Wheel bearings?
Manual? TIP?
Is this resistance with the clutch engaged?
How sure are you you have released the parking brake?
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