The problem isn't with the players it's with the design. If the dungeon was meant to be one-time, story driven, then cutscenes are appropriate throughout. I'm thinking along the lines of CoP missions where you go through it once with other players who either also need the content and want to see the scenes or 1-2 players are there to help you as friends and aren't worried about the extra few minutes it takes.
SE REALLY needs to get on board with modern mmo design.Some things they are learning, but other things are still seriously slow. Even the option to skip cutscenes is annoying as all hell. I'm grateful they at least added that, but my character literally stopping every 5 minutes in CM, fading to black, spinning busy icon for several seconds, then fading back in (and it's what, a total of maybe 7 times during the course of the encounter?) is so beyond intrusive and obnoxious I don't even know how something like this made it past their QA.
It's caused the kinds of issues the OP has run into where he as 1 person wants 7 other people to let him take it slower, and those 7 other people exercised their right to remove him from the dungeon because he wasn't participating in the fights and helping the group. It's NOT griefing, and nothing at all will happen to any of them. This is a problem that SE needs to address. Cutscenes on the player's INDIVIDUAL time before and after group content, but not in the middle and certainly not to the degree it was implemented in this content.