This is not news, but Cataclysm Heroic 5 Man dungeons are very hard.
Well, kind of. It depends on the group and how well it communicates. In my opinion, communication is the single most important factor in determining the group’s success. All other things being equal, a group that talks to each other and discusses or explains the encounter strategies will succeed where one that doesn’t communicate will fail.
The PUG groups that I have been paired with using the LFD finder have been failing a lot.
With most LFD groups, the communication has been terrible, and its really been affecting the results. I’ll give you four examples using a couple of the runs that I have done over the past couple of days which have had differing levels of communication and differing levels of success.