My guild and I have made some pretty steady progress recently on the raiding front, and we're close to getting 11/12.
I have enjoyed the raiding content so far in the game, but we're really feeling the pressure to down all of the current content before it gets nerfed to oblivion in patch 4.2.
We're pretty casual - only raiding 6 hours over two days each week. Only raiding so little time each week usually leaves us limited time to get attempts in on final bosses, but it all works out.
Wish us luck as we push to get everything down!