I got a chance to go test these today, and Im impressed. The test was done on a 25 mile off road loop that I have tested other shocks on. With the Icons, I was able to push things a little faster than other shocks I have tested in the past.
The low speed dampening is boardering on the very firm/stiff side. Below 25 mph things are kinda harsh. around 30 to 35 mph things smooth out, and at 45 mph (wash board, rutted, with some good size holes, washes, rocks, etc.) things become absolutly wonderful. Under acceleration on ruts, rocks, uphill, the back end was planted the whole time. Sliding around corners, off and on power, the truck was completely stable. Even when pushed to the edge, the back end felt composed, and seemed to comunicate its actions well. The ambient temp was 77*, and the the hottest I could get the shocks up to was 88 to 90*, while the remote resi stayed at ambien temp. The fronts (in comparison) got up to 87 to 89*. These are a perfect match for those who are running a digressive rate 2.5" front CO. The only changes I would suggest is a softer low speed dampening.