OK, I'm convinced. The 1500
has had coil springs in the rear for a few years now, I think since they came out with the latest body style.
I hope they work better with the 2500 because I have heard some people complain about stability when towing with the trucks that have coils in the rear, and they weren't big trailers either.
I know it's not the coils, because there's no doubt they can handle the weight if designed for it (after all, they use them under all railroad cars), but if the control link bushings get any slop at all from wear, instability and sway will be the result.
Happy now that I have a '12.