I just got back from a cold and wet camping trip and I thought I would offer up a bit more info. on the new tires. I have found that the best air pressure for the tire is 40psi and I have not seen a drop in MPG. We did some easy trail riding through the mountains, nothing crazy just muddy fire-roads. The tires worked great in the mud and I felt very confident with the new tires. I was not mud-bogging or anything, but they cleaned out nice.
The tires also did great on the wet highway, no signs of hydroplaning and they felt more sure footed than my old Destinations.