Specifically I have a Ret pally friend who is having a really hard time. I did some poking around when he was lower geared (he is ilevel 491 now) and found that proportionately his damage seemed to be similar to higher random pallies that I used for comparison, but doing much less damage per attack than they were. He is up to ilevel 491 now and it hasnt seemed to make much of a difference. He did great damage in Dragonsoul but maybe that was just the nature of the boss fights or the Ret dps, because since MoP he has been reliably low, often below my tank (Blood DK).
If any of you have some time on this lovely maintenance day, to drop a few tips or look at our most recent logs for him and see something glaring, I would be most appreciative. Here are some Logs for the month of march
His name is Chipstock on US-Thunderhorn.
I do know he has the set shoulders for tank on, hopefully he will be getting this changed tonight. He picked the wrong ones last night in haste, just looking at the Exp/Mastery stats instead of the set bonus.