Are you driving so agressively that VDC is kicking in that much (You can always switch it off, but if you are driving that hard, I wouldn't advise it)? Unless you see the slip light on extremely frequently or you have the parking brake stuck partially on, I don't see how your rear brakes would be wearing so fast; the fronts should go long before the rears and nowhere close to such a low milage. That would be considered premature wear and they should be replaced under warranty (even if VDC WAS causing it) and they should be looking into the cause. If your dealer is uncooperative, try another. G35s had this issue, but this is the first I've heard of it on an FX.
Oh, and welcome to the forum. 8)