Just got the Ogre Armybook. They are in the Special section, but they are classified as Rares in the GW catalog. Gorgers are the last entry in Special, it could be that they were meant to be Rare but it was not clearly marked. I'm 90% sure Gorgers are supposed to be Special but I want to check.
they were rare in the old book (thats when the rulebook was written), but now they are moved to special. anything that is printed in an armybook (provided it is of the latest version ofc) overrides anything written in the main rulebook. and everything written in an official FAQ/errata overrides both of those.
Yea, they are now special. I do not think most people use them as much because they sometimes take too long to enter combat. I would like to take Skrag and see how they work with him now. They make great warmachine hunters when they come on in the second or third turn.