I've actually found that people tend to be a lot more patient and considerate in heroics than in normals. I've had several very smooth heroic runs, even one where we didn't get past the first boss because the healer left with a smile, saying he didn't think we had the dps, but great attempts. He was probably right, 5k isn't really a great number for heroics.

Whereas in normals, I've been screamed at, told GOGOGO more times than I can count, told "CC is for noobs" as they rush up and break my Sleep, and kicked for not being able to keep the entire group up when two Earthshapers were allowed to transform because, of course, interrupting is probably for noobs, too.

People don't treat normals seriously, so they think they can be as stupid and abusive in them as they were in Wrath dungeons. Heroics, however, are still dangerous and somewhat unknown, so people seem more willing to cooperate and stick it out.

Of course, you get your fair share of "We wiped twice, these guys are noobs," group-droppers, but overall I've found heroics far more tolerable to PUG than normals, surprisingly.

I've noticed no difference. I have to say they've seemed very much the same to me (not in terms of difficulty but the people) Sometimes the people are nice, sometimes they talk tactics and sometimes people are rude and don't, or a combination of the above. I have to say though that both are a huge improvement on Wrath dungeons and heroics where the chance of people talking was probably 1/10.

O have to agree with Snuzzle. Even on the most wipe-filled pug/LFD runs, everyone pretty much has a very casual attitude towards wipes. Hell, the answer to "What does this boss do different in heroic" is more often than not "We'll find out when it kills us" and everyone has fun with that attitude.

We've had maybe 1 person ragequit on a run since cata launched, and that was a VERY bad DK tank. We all figured he was just a DPS who queued as a tank for the instant run and was a bit disappointed when he couldn't just "Wrath" his way through it.

Otherwise Cata seems to have led to one of the all time highs in the community's level of respect all around. DPS offer to CC without prompting, will pay attention to things that suddenly make a beeline to the healer and try to head them off, and generally attempt to play more intelligently than ever before, even offering alternative pull strategies when things start going rough.