I have yet to do the glop son of glop daily. I did it once when I was going through the quests initially, but I have yet to not see a line of people standing where the shaman spawns trying to ninja their turn. So far I just dont even bother with that quest, The one to ring the crystal is the same way. When that one is up, there are usually 4+ people trying to ninja the dragon.

But there have been a lot of places that had players bottlenecked waiting for some quest boss mob to spawn. Into the Maw in Twilight Highlands was really bad where you had to free 4 of the earthen ring guys and kill the spiritbrain. I had around 20 peeps in there when I went through.

In time it wont be as bad, but its a design flaw that they need to work on for the next expansion. I also feel that its been way to quick so far. look how long it took for boxers to get all the heroic modes down. Its been 2 weeks and they are already down.