I know that you can find this out on other Wrangler SRA discussions as well, but for what it's worth, SRA's have come as standard equipment tires on GM and Ford trucks too - with many of the same owner opinions. I think it's cost accounting and large contract buys on the part of the manufacturers.
My experience is not as dramatic as some of what I see in this thread. I have about 8600 miles on the OE 20" SRA's, and I hope to change them off this Fall for some E rated tires - probably Nokian Rotiivas.
I agree that the SRA's are 1) relatively smooth, 2) fuel efficient, 3) okay on a dry road, 4) below my expectations in the wet, and 5) unsettling in snow (especially slushy) conditions. I run snow tires (Michelin or Nokian) on our other four vehicles during winter here in Minnesota. My opinion is that the SRA's on the RAM just don't handle the wet and the snow the way that I want or suit the conditions in which we drive - but my brother-in-law's Chevy Silverado came with the same tire, in the same size =(.