Just out of curiosity I tested the torque on my CS wheel bolts. My car hasn't been touched since being assembled at the factory, and the bolts on three of four wheels were well below the factory torque recommendation of 96ft-lb or 130n-m. The passenger side bolts were especially loose. My car has about 1600 miles on it.

It is good practice to re-torque the bolts at about 50 miles after every re-mount of the wheels. A good 1/2" drive torque wrench (I use Precision Instruments) and a 19mm socket with wheel protection is a good investment for any Porsche owner. (An extension shaft is also a good idea.)

PS - on newly delivered cars, check the air pressure in the tires. Nearly all new cars are delivered with very high pressure, and you should lower it to factory spec for your tire size.