I've played a tank in several MMOs, my secondary role is usually healer. I typically keep the pace as fast as all other factors allow. Before the dungeon starts I ask if everyone has either done the dungeon or seen a video on it. If someone says they haven't, I tell them I'll let them know mechanics for boss fights if there are any important one. Other than that, I only pause for a second before mob pulls just to make sure everyone is with me (don't want to pull and the healer is way behind). Other than that, only time I'm pausing is for CD, TP, or healer MP.

I also have one rule for impatient DPS that try to pull before me and I let it be known as soon as I enter a dungeon. You pull it, you tank it. I don't try to do your job, so don't try to do mine.