I'm just started tanking and I do find it rude if DPS pulls behind my pull. I adjust my pulls based on if the Healer can comfortably keep up and what cooldowns are up or down.

Usually they listen when I inform them that as the Tank I determine the pulls as that's my role. If they aren't satisfied with how I'm pulling and how large I pull then they're free to leave or tank themselves. That usually gets them to slow down and let me do my job as more often then not most DPS don't tank and don't want to tank.