I just got out of the best LFR group I've been in for a long while. It was a true LFR group, with people from several servers. It didn't seem to be a quasi-guild group.
It was for the first 3 bosses in Throne of Thunder. Jin'rokh - one shot, only one death. Horridon - one shot, one death. Council - one shot, zero deaths.
No one behaving badly in chat. No elitism or stupidity. No fighting over strategies. People doing what they were supposed to. Just clean and efficient execution.
I'm still ecstatic over that run.