Since these threads seem to be proliferating, I figure'd I'd just start a new one. Here is a quick Q&A.
Q: Is Ret OP?
A: Perhaps. We think Ret's dps isn't abnormally high in PvE, and may not even be high in PvP over the course of a long fight. Where we are worried is how much damage Ret can do up front. It's also Holy damage, which isn't a big deal when you're considering a fully sundered mob, but can turn into a lot of damage in PvP.
Q: Are we going to nerf Ret?
A: TO THE GROUND BABY. Okay, not really, but sometimes I can't resist. We'll see how much that quote comes back to haunt me. We will probably be making some changes soon, perhaps even hotfixes. We want to be very surgical about what we do. We don't want to overdo it, and we don't want to hurt their sustained PvE damage. When we've decided, I'll make sure you all know.
Q: Why did it take us this long to admit there was a problem when EVERYONE knew about it?
A: A couple of weeks ago there were some bugs with weapon equipping that caused some problems that of course were being exploited. We didn't want to nerf Ret TO THE GROUND BABY only to discover that the weapon problem was causing 90% of it.
Q: Enough about Ret. Unholy death knights are worse!
A: That wasn't a question, but we think we have Unholy in a better place now. We made some changes to a few deep talents (that the DK community is already aware of, so don't fret) to get Unholy's dps more in line. Also, you aren't going to see any PvP DKs for a long time, so we need to focus on paladins for now.