I am at 66% wear after 13 months according to the NHC on my 5672.
Can anyone beat that?
On a side note, now that I am out of warranty, I pulled out the handy cordless drill and swiss-cheesed my HD cover and my RAM/CPU cover on the side furthest from the fan.
My hard drive temps have lowered to a steady 35 from 42 when using my cool pad that blows upward through the holes.
CPU is still around 50 because that's what the built in fan settings dictate, but I am...