Please define speed run. I don't think anyone doing Duty Finder expects a "speed run" do they want to go as quick as possible? sure.. but I doubt they're pulling multiple packs of trash if the group cant handle it, and or doesn't have ideal AoE classes.

Do people really want to go slow? I'm confused.

You expecting people in DF to go slow cater to your play style are just as bad as those you complain about. Every DF group should go as quick as the group can handle without going overboard, that's just common sense. That doesnt mean pull bosses if people dont understand how to fight them.. but I dont get the whole go slow concept... Speedrun is a very generic term... Ive had "speed runs" take 30 minutes in WP, and ive had them take 10 minutes.