Whatever normally holds that cable in place must have come loose giving the cable enough slack to rub on the starter or what ever it was rubbing on. Also must have been doing it for a while because it is not super easy to rub off the insulation that quickly unless there is some semi-violent bouncing around of the cable itself. How many miles on the car when you got it?
This (to me at least) is wierd. I have worked on cars all my life and all I can think is that someone on the line was having a bad day that day. Something was not secured correctly from the start. Hopefully it is isolated. You should ask them to show you the worn cable so you can get a pic of it and post it here. I would love to see it as I'm sure everyone else would as well.
Glad your car is fixed though. I hope that this is the last problem you ever have. Good luck.
VIN = 2G1FK1EJ4A9112201
1100 = Preliminary Order: 3/21/2009
2000 = Accepted By GM: 3/27/2009
3000 = Accepted By Production Control: 3/28/2009
3300 = Scheduled For Production: 5/9/2009
3400 = Broadcast:5/13/2009
3800 = Produced: 5/22/2009
4150 = Invoiced: 5/25/2009
4200 = Shipped: 5/25/2009
5000 = Delivered To Dealer: 6/9/2009
Ordered: Victory red, black stripes, RS/SS auto, sunroof, painted engine cover.