Short answer. No they arent stock as a rock. The only thing that would make them lower is all the crap they have to cart around. Stock power. standard ride height
As with everything it will depend on how diligent you are in preventing things occurring. There are some products that you can buy that condition the leather/fabric
Give your local dealer a call with the build date and possibly VIN. What is the build date BTW. If its june 07 0nwards it will still be under warranty required its under 100,000ks