This. Fury has done a lot of catching up with Unholy as gear has improved, but the two specs are at best competitive. From a progression standpoint you assume people are entry level geared, not near BiS for the tier, which is why I wrote it the way I did.
In 5.4, Unholy will drop. Mainly due to the lack of a Feathers type trinket to abuse diseases with, obviously blizzard has yet do wave their magic wand and "balance" dps for 5.4, but everything I've heard points to Frost making a come back.
As for Rogues, Assassination Rogues are by and far the best Melee dps in the game right now and have been the whole tier. Not only are they very high damage to begin with, their immunities mean they get a much higher uptime on certain bosses than other classes, and better survivability as well.
@Opeth: I can't remember the last time I saw a Feral or Enhance up high, but then I haven't played with any good ones in quite some time. Comparing to Ranged is much more difficult and really depends on the fight, but Hunters/Ele Sham don't generally give me much trouble.
You'll never beat a Warlock, might as well get over that right now!