My Opinion on why WAR is the superior Tank.

[ZDamned]

Time to ignore a lot of fluff here.
Tanking is tanking, and DPS is DPS like Kitru said.
If were looking at the game objectively, the best way to help your group is to kill the boss as fast as possible. (T6) So Tank DPS is important. End of Story. (Not Stone Skin, not Cure, Shield Swipe, and Attacks)
Warriors are likely more than 10% higher on DPS than a Paladin in Sword Oath.

My latest test in ilvl 96 DPS Accessories on my Paladin yielded 245 DPS in Sword Oath.
My Warrior is ilvl 90 was able to achieve 230 DPS in full Tank gear. (Defiance off)

Its worth noting that with a Warrior in the party, my test would have been higher because of Storms Eye, but I have not tested that yet on a training dummy to see how high my Paladin can go.