There are some complains about a protection Warrior doing decent DPS, but something is wrong. If the tank, who is wearing a set of gear which maximises survivability, is topping, or coming close to topping, the DPS meters them there's something seriously wrong somewhere.
Of course, I am assuming that Kadomi is geared similarly to the rest of her group, and that Daughters of the Horde are very much at the casual end of the spectrum, however, the DPS are struggling to out-damge the tank, there's something not quite right somewhere, whether it's in their rolations, their choice of spells or even how they have gemmed and enchanted their gear.
Tanks can do reasonable DPS these days, but if the players who are supposed to be doing the most damage aren't, then everyone should work together until they are back in the right place again.
If tanks could do an equal amount of damage to the DPS players, what would the point of taking the squishier people with you be?
For the most part you're concerned with battlegrounds, it's quite simple. Gear is very important. Get your PvP gear, as well as crit gear. Pick up a couple of good 1 handers (I use [item]The Decapitator[/item] and [item]Fool's Bane[/item]). Get as much crit as possible (I'm pushing 32% in berserker stance), wade into the fray and just Devastate spam like crazy. Don't forget to use your interrupts on spell casters, and feel free to utilize your other tools as well, such as Intimidating Shout, Whirlwind, Hamstring, etc.
Part of being successful with this spec is choosing your targets. Pick the squishies, although I don't recommend frost mages as you'll find yourself frozen in place more often than not. In particular Rogues are particularly susceptible to your attacks.
Currently everyone pretty much outgears Zul'Aman and Karazhan, so what's happening are huge, huge group pulls, like 3-4 trash groups at once.
Now with damage shield and the new thunderclap & shockwave, these are the warrior's DPS-highs. Also the amount damage shield does on boss fights is not to be underestimated.
So the situation will normalize towards new content, when pulling two or three trash groups will not be the way to go anymore. Tank DPS did increase significantly, yet it's very, very situational on how well we perform and there's no guarantee for any dps-numbers at the end of a fight.
As a prot warrior, I've found that in an equally geared guild Kara/ZA run, as usual I end up slightly behind our DPS classes per Recount. I'm not struggling to maintain agro and following both the prioritized single target ability and "Venne approved" AOE rotation so I'm fairly certain it's not overpowered class mechanics causing Kadomi to find herself so far up the DPS charts. I would assume that any raiding guild worth their salt is giving their MT's first crack at tanking plate gear drops so logically Kadomi should be a step or two ahead of the rest of her guild in terms of gear quality. It's been my experience that players wearing most or all of the class appropriate drops from an instance are overgeared for that zone, which Kadomi is in ZA.
I'm feeling like prot warriors are right where they need to be compared to other classes when similarly geared and running appropriate level content. The only class that seemed really out of whack after 3.0.2 were Ret.