I've had mine for about 5,000 miles and are at 2.20 right now for the life of the tires. My avg before the Defenders was about 2.28. They started out at 1.8 and I have gained efficiency since. I figure they are going to be very close to the OEM Pirellis after summer.
Pros: Very quiet, 70k...
I just had these tires installed yesterday at Costco without a problem. In the employee's computer system the tires match with the specs of the OEM tires so you should be good.