As Arms for my guild, I lose about ~300-700 DPS going from Normal Rotation to Sunder Rotations. The reason for the disparity is some fights are very sunder-unfriendly. XT Deconstructor comes to mind. I sunder the boss, get the bomb and have to run, sunder could fall off. Or heart is exposed, boss becomes immune to taunt, sunders DO fall off. Hence I must restart from 0. DPS races where I *HAVE* to get 5 stacks within 5 or 6s, I tend to lose more DPS as well. Whereas Hodir is closer to 300 DPS loss.
My rotation was posted in a jpg format here:
In-Depth Arms DPS Discussion
Thunderclap is an insignificant DPS loss. I usually use it in lieu of Slam.
I never demo shout... so I'm unsure as to the loss there. :/
I can get you wws reports later, if you'd like. It may take me a while, as to get the same fight with roughly the same buffs, with me sundering and with a prot warrior sundering (we don't always have a prot warrior with us).