Just had mine replaced under warranty, premature wear was the statement from the tech, caused by the seatbelt rubbing on the leather everytime you put it on, also gets scutched when you get in and out if your not carefull...had to change the way i get in and out of the car now ie ass in first the twist and sit, crap really, but works. I gave the seats a quick clean with saddle soap, then into the dealership, stating ' i keep the seats cleaned/saddle soaped every 6 weeks, you can check them if you want, but it has still worn on the bolster...blah blah etc etc..' He said no problem, we'll replace under warranty
also got the drivers interior door pull/handle changed as well, seeing as that had started to blister.