2,000 miles on the tire.  I will measure tread depth and do a video review later this week.  Just got back from Sunday River in Maine.  On the drive home I encountered some bad conditions.  Only about an inch of snow but it was icy, accidents, cars fishtailing on the road in front of me, yet I stuck like glue on these tires.  Their performance on snow, ice, and rain is superb.  The conditions changed to rain for about 200 of the 250 miles I drove and they do just as good a job sticking to the road and I have had no problems hydroplaning.  Tread depth after 2,000 miles just under the original 12/32nds but not quite 11/32nds.