I don't think I have ever seen someone tell the tank to go faster. Even though sometimes I do think to myself that they should go faster (pick up more mobs) because I am twiddling thumbs healing them, and I don't like to DPS on trash. But I would never tell them, they either notice that the 1-group pull is no challenge, or they will keep their own pace which is perfectly fine.

On the other hand I have seen several tanks ask whether people want a full clear, and if someone wants it, others are fine with it in my experience.

So I'd suggest asking at the start of the dungeon whether a full clear should be done, and I am fairly certain most people won't have a problem with it.
Communication is a key, when you don't say anything, people will assume that you don't care and just go as fast as they are comfortable with.