Most of the time when I go into a dungeon using DF, it's to complete a specific task and do it as quickly as possible. Whether it be gear for GC turn ins, exp, or tomestones, I want to get it done fast so I can go back to doing the stuff I actually enjoy doing in the game, which is usually crafting or gathering.

I understand your frustrations, but if you want to take your time, you're better off making your own group in PF or with FC members instead of getting upset with random people in DF. If you don't want to do that, then your best bet is just speaking up and asking if the tank can slow down a little.