That's not very much, especially considering in 2.X you could pull 10+ mobs and LITERALLY to the boss door each time. I can understand the frustration though, you're in a dungeon that's in HW, but you're at that awkward point where it kinda feels inbetween. Your tanks's seem to be wearing cardboard boxes for armor and if they don't know how to manage CD's it can become a nightmare. Tanks always should stop and assess the situation, look at your dps/healers gear and watch their skills with the first few pulls. If they seem to be doing good, try bigger ones. If not, just do it normally. Honestly, I don't see how bigger pulls are supposed to speed things up, it always seems to take about the same amount of time anyway. Tanks should pay attention instead of running like a fat kid after cake being pulled by a string to a candy shop ._.