Since this thread has been resurrected from the dead, I'll add an update on my experience with Cooper ST/Maxx tires purchased in March 2014:
Size: LT265/75R16-E
Date purchased: 3/25/14
Miles to date: 22,407
Tread remaining: 45%
Punctures/repairs: none
Estimated tread life to 4/32" tread...