I don't really ask, mostly cause I'll just get "I don't care" or "do whatever you feel like" the few times people even take the time to reply, I just tell them "speed pulls unless you request otherwise, I don't really care either way". The reason is people don't want to be blamed if something goes wrong. The tank ask what they want, they say large, group wipes, person who asked for large pulls is at fault. On the other hand if you tell them it's speed pulls unless asked otherwise they can safely agree without fear since they can just blame the tank like always. Or in the rare case request small pulls for one reason or another. The only rule is: Always let them know, might be an easy dungeon, but that healer might be half asleep or dealing with a cold and not up to speed run standards.