SimulationCraft 505-2 (r14297) for World of Warcraft 5.0.5 BETA (build level 16048) states that Ret is outdpsed by almost all classes, except the Monk and Priest both of which have a healing spec like the Paladin.
3 Warrior specs, 2 Rogue specs, 2 DK specs, 1 Shaman spec, 1 Druid spec, 2 Warlock specs and finally 3 Mage specs outdps the Ret according to the data provided by the simulations.
I have lost words to describe how unfair this distribution is, and how Ret has been discriminated despite being the only dps spec of a class.
Oh wait.. We can throw in a heal or two...
http://www.simulationcraft.org/505/Raid_T14H.html