Last night I had what was probably the best LFD group I've ever gotten despite several wipes or almost wipes. The entire party actually communicated in /p, we chatted, and had lots of fun and laughs in regular stonecore.
I was leveling my Mage/Bank alt to be ready for MOP so I can cap her professions again. We had a pretty good DK tank and a decent healer and 3 pretty good dps. The tank keeps overpulling, but instead of people complaining about it, we took as a challenge to use all of our abilities and survive. I as an arc mage rarely use Cone of cold or Frost nova, but they are on my bars just in case.
I was also using my sheep stun and various abilities to kite and solo individual trash mobs. We had a bunch of great jokes and laughes, especially on the last boss with the 3 large packs of non elites, wiped about 3x trying to do a single pull, our hunter finally leaves group and another DK zones in ontop of the Tank's dead corpse in the middle of the huge pack and gets pwned really quick. Everyone laughes and we kill the boss and part ways.
TLDR:
You can have fun in LFD, and with Real ID you can add these people to your friends list.