I'm driving a 2013, but have had AT3's and Duratracs installed in less than 1k miles.
Tried the AT3's (p-rated), couldn't get them balanced, so they were returned. They were also LOUD. The BFG AT KO's were my second choice, but they only had 3 in stock. They suggested the Duratracs (c-rated), but I was worried about how "meaty" the tires are. But I have to say, the tires are AMAZING! Drove home in the rain last night, and to the office in light snow today. The tires are impressive! Much better than my Nitto TG's (p-rated) that I had on my 06 Sport. Very quiet tire, I can hear them if I listen at highway speed, but nothing below 50mph.
A side note, they look great, and really transform the truck! There's also a rebate.