A couple of A'lar attempts last week got me thinking about paladin tanks again. Basically, if I were specced Protection, I would be a much better add tank than a warrior or a druid.
Ironically, this is because I can control the adds from range. Rather than chasing them down and then moving them into position, I could use Righteous Defense and Avenger's Shield to bring them to me. This is an amusing power, considering that paladins are the most melee-centric of all the classes.
The paladin's high, front-loaded threat also allows DPS to burn down adds faster. I don't think most adds deal crushing blows, so you could gear for spelldamage and stamina. Not to mention that we are hands-down the best AoE tank.
However, a paladin tank would still be much worse than a warrior/druid for tanking the main boss, or even building threat as an off-tank. Is being the best add tank enough? Is it worth bringing one paladin tank over a warrior or druid tank?