Statements like these really outrage me, because they make Devs look like fools. It's as if they were not playing their own game.
In reality, I remember my guild raiding during Vanilla, with Rets as DPS, Moonkins DPS, ferals as DPS, and Shadow Priests as DPS (who were also over buffed during the final stages of Vanilla) though we had dramah every day and -mostly- druid tears about how Druids were doing soooo little DPS.
In reality, nobody really cared because there wasn't any reliable way to measure one's DPS. As long as you had decent gear and you had everything enchanted, getting a spot in a 40 man raid was really no problem, and that -yes- includes even Retardins who were raiding as Ret with that stupid legendary weapon which I forget now and they were perfectly viable.
I even remember days we couldn't find enough DPS to do MC or BWL, and Officers would ask if we had any friends -who knew tacts- willing to fill the Roster. Other days we raided MC with 32 people, or even 28. And there are people here -even Devs- who claim that hybrids couldn't raid as DPS in Vanilla.
The worst part is that this skewed opinion of GC, which he retained when he became Lead Systems Designer, led to pure DPS suffering the most massive nerf storm ever in this game while hybrids such as Ret, were buffed to such a ridiculous extent, that we ended up with Rets being more than Rogues, and many people within the Paladin community even equaling Ret to whole CLASSES such as Rogue or Hunter.
We often see people complaining about Ret's Arena, BG or Raid representation at the forums, arguing that they should be equally well represented with pure DPS classes, and that is Blizzard's fault because they spoiled Rets in particular in thinking of themselves as special and superior to the rest of us poor buggers who play pure DPS classes.