I'm not much of a PvP player. I enjoy random battlegrounds, particularly when I'm healbotting someone who cares whether I live or die, but I lack a certain something when it comes to better performance. I think that something is called talent, or perhaps just luck. We might even call it gear. Regardless, I'm not a great PvPer, so I usually sit on the sidelines and observe while the people who are great PvPers argue about arena team composition and rated battleground strategy. These people have not been enthusiastic about restoration druids in Cataclysm.
That's not normal. Resto has been a strong PvP spec since season two of The Burning Crusade (although we need to make an exception for the dismal season five at the beginning of Wrath of the Lich King), so it was a surprise to see such widespread ambivalence among the PvP population. However, there does seem to be a broad consensus about why resto has so many problems in PvP, and people are cautiously optimistic that Mists of Pandaria will be better.