Yeah, but it's arguable when you work in WAR's utility too. I think it ends up working like this for Tanks.
WAR: Best OT DPS, High MT DPS, Best Utility
DRK: High OT DPS, Best MT DPS, Worst Utility
PLD: Worst OT DPS, Worst MT DPS, High Utility (And I'm being generous with utility for Pally's)
Only thing they got going for them equally is defensive capability with minor advantages based on specific situations that happen to cater to their strengths.