In an average raid a good ret can out DPS a poor player of another spec.
Sniped for effect.
Class design has failed when a player is rewarded based on what class they selected at the character creation screen.
I fully expect it will change... but how and when remains to be seen.
TBH it is just a question of balance. Even in the lolret days you could do enough DPS to justify your raid spot, it all depended on your guild. Not everyone is in an elite world first guild. Most of us are far more casual than those guys and there is a range of gear, skill and even latency that means no one is truly lolret anymore.
The problem comes with how much harder you have to work to keep your raid spot. In TBC the gulf was so vast that to get into kara I had to farm a PvP set (back when the ret set had no resilience for some unknown reason) while guildies who hit 70 at the same time could do enough DPS in blues.
At the moment ret DPS is low, but it remains to be seen if it is lolret low. I suspect it isn't that bad. But we need numbers to be sure.
And there is a secondary issue that happened with lolret. Even though an individual could compete for a spot it could be hard to get a chance to raid. The biggest problem with lolret filtering down from top guilds was the stigma that came with the spec. People by default would not take you just because of the spec.
And this is going to be the biggest worry. If rets start getting kicked from LFD PuGs just because they are ret then blizzard will need to get hot fixing pretty quickly.