I was at my tire/lube place for typical maintenance, and they warned me that my front pads looked low. After an inspection, they said it was 2mm on one side, 3mm on the other. Rear shoes were at 7mm ("like new", were his exact words). This is at my vehicle's 180,000 mile maintenance (actually performed at 179,300 miles). Is this normal that the rear brakes still have so much left, vs the front? (I guess, by normal, I mean for a hypermiled vehicle. ) This is on a traditional ICE'd 07 Toyota Matrix, base engine (front disc, rear drum). I downshift when coming to a stop regularly (keeping an eye on RPMs). Thanks.