Yeah, it can be annoying. Usually the tanks are in control of this though. Some of them will just run to the next room....and the next...and the next...and then they'll have like 15 mobs on them and be almost impossible for the healer to keep up, either because they're not adequately equipped, or weren't expecting it and are still catching up etc.

The irony being that by just rampaging ahead trying to rush everything, if anyone's new or whatever they're just making wipes likely which could make it more lengthy than the pace of an average run. You'd get it done quicker just by going at a steadier pace.

I actually got moaned at for being a Monk in WP by a BLM. Even though we finished it in decent enough time, about 15 mins? Okay, we can't AoE like a BLM/SMN/BRD, but I guess an extra 2-3 mins tops is unacceptable :P