I had a similar experience when I ran CM for my firs time. 4 people queued together to do a speed run, I watched them speed run to their deaths as I was a WHM, they couldn't make it too far w/o me.

So I continue to queue every once in a while to rerun the dungeon. If I know there is a person that is new to CM I hang back with them and smile when I see the HP bars of all the impatient DBs steadily drop and not recover

Like the OP said, If you insist to speed run, do it with 8 members of your free company, If you rely of the duty finder to fill in your group, don't be a douche and get angry at people when they want to watch the CS. Let them enjoy the game.