If I'm running a leveling roulette, I always ask at the start if the group wants large or small pulls (usually they say large now), while if I'm running an expert dungeon I usually pull large by default (unless someone in the group is new, then I ask). When I say large I also only mean usually a double pull, not a "pull everything until the boss". While I was still leveling up, and when I was fresh to experts and not geared, I only did single pulls because I couldn't take the hits.