Well, the thing lately with loot that I've been seeing is this.
Everybody seems to roll need for main/offspec loot that drops. (ie - you are running as a tank, and you've got a DPS DK, DPS Warr with you and a tanking item drops, you can guarantee they are rolling on it). So I've just adapted and when I'm running randoms with no guildmates, I just need on anything that is an upgrade for either spec. The consensus is that you queue up for both specs, so you might not be running the heroic as your main spec. Sure you'll have some people complaining about it. Some random hunter freaked out that a Resto Druid rolled need on Marrowstrike when it dropped in our H ToC. He wanted it for his tanking in bear, and the hunter though we should have just given it to him. I even gave him more nerd rage when I rolled need on it and said I wanted it for my ret set even though I was tanking at the time on my pally.
I love running dungeons on my pally since I'm an enchanter and get to see everything DE'd automatically

Nice change from handing out shards.
Also there are a few classes complaining about stuff getting DE'd that they could use as an upgrade. (ie - cloth piece drops nobody wants, but the Druid could use it as a resto upgrade. Can't roll need since the random pugs are forced need before greed). So the item usually ends up getting DE'd or given to whoever wins the Greed roll. Rarely can you get anyone to pass on such things in time for you to be a sole greed roller for the item.
I see they are nerfing more H instances today. Nexus, Old Kingdom, and they are looking to come up with a way to bypass the script in CoS. People are dropping out of that because of the additional time it takes. I get in groups now and people are like, C'mon stop wasting time, pull faster, I've got a raid in 20mins, etc... etc...
I even had a resto druid going ahead pulling for me in H DTK (guess I was too slow) even though we mad rushed the instance.
Best instance run I had yet was me tanking in Halls of Lightning, and we had a resto shaman that was not well geared and was concerned about being able to heal us through Loken's nova...Our mage just said don't worry about it and popped his trinkets, etc..and did 14K dps on Loken and we had him down in 20seconds before he got a nova off. Pretty crazy.