i was listening to the soundclips of that head, and thats definately the new part of stephens distortion. i saw them last saturday and it sounded like his distortion had more nuts than it did before (hard to believe) and because they dont have amps on stage iwth them i couldnt tell why. this is definately a piece of the puzzle.
epiphone les paul, fender strat, ibanez RG
vox clyde mccoy wah, line 6 mm4, visual sound h2o, ibanez de 7,boss tu-2
mesa 2 channel dual rectifier with el34 groove tubes
for gods sake people use the search function!!!