With the warmer weather I went over the tires again for inspection. To date I've put about 4500 miles on them, so I got out the tire guage. Tread depth is just slightly over 10/32", so they 'might' be wearing faster than they should if they are going to get to 55,000, but time will tell.
The tires are wearing evenly all the way across. One of the very cold days the pressure was about 5psi low, but that doesn't seem to have affected anything. Until next time I'm just adding miles hoping for some good snows!