I've some time off this week, so my AV runs have been split into two separate groups: early morning and mid-afternoon. And believe me, there's a huge difference in group personality between the two times of day.
The early morning runs are quieter with less chatter, and more attention paid to details. Call outs are the norm, defense and back-caps are common, and you'd better run in a pack if you're a glass cannon (aka Mage). People actually thank you for the Lock cookies, Feasts, and Rituals of Refreshment. If you say "need 1-2 more to defend SHB", you'll actually have 1-2 (sometimes 3) toons appear from nowhere to assist in defense.
Mid afternoon, on the other hand, is an exercise in confirming stereotypes.
I've rushed in, taken Iceblood Tower, and then watch everyone else as they moved on en masse.
"Need 2-3 more to defend IBT."
When the inevitable backcap happens, a flood of recriminations spits over BG chat.
"You @#%&ing idiots! What a fail group!"
"Somebody go back and get it!"
"Get it yourself, retard!"
"Doesn't matter, we can win pulling with two towers up."
When THAT strategy doesn't work, you get:
"What a fail group!"
"Yeah, healers suck!"
"You're tanking in Fury Spec, you idiot!"
Oh, and did I mention the 3-4 people who hang around the BG entrance, waiting for the free Honor?
Why the huge difference in group personality?
I can think of one reason: the early morning runs aren't populated with the teens/college kids that the latter runs are. After all, those folks are probably sleeping in until noon anyway.
If that's the case, then shouldn't the 5-man LFD runs mimic the BGs? You know, I don't know, given that I haven't run LFD in ages, but it wouldn't shock me to find that out. My experience from previous times, however, is that LFD is such a small sample and such a mixed bag that you never know what you'll get. BGs, having larger numbers and are quixotically quicker than your average LFD run, tend to take on distinct group personalities. And when those personalities change --due to an injection of teen hormones, for instance-- the result is noticeable.
Dealing with the mid-afternoon crowd isn't too difficult, just keep your expectations low and ignore most of BG chat. Well, and also console yourself in the fact that the current AV queue time is 1-2 minutes. At least you're not waiting 1/2 hour for LFD to pop.