I personally don't care either way at what speed DF parties want to run, although I am always a bit leery when I see a tank run off to start a speed run, before healer can even buff us.

A big part of the negativity to speed runs imo, is the random factor of DF. You get bad dps? can't speed run because healer will run out of mp or tank will run out of def CD's and you'll wipe. You get a bad healer? Wipe. The worst imo though, is bad stubborn tanks, the ones that run off as soon as they can, never look at party composition, don't use any cooldown's, then rage at everyone else for being "bad", and they'll keep trying to force a speed run, blaming everyone else for each wipe.

Most people I run into, have no problem when it comes to wanting to improve, the only people I meet that make game frustrating, are players that are convinced they are already the best.