As of 1.20, for the current dungeons, this argument is essentially moot.

With a Pick Up Group,

3 Vets,

5 Noobs,

2 45s,

Cleared Ogre with 30 Mins on the Clock.

That being said,

For future Dungeons I hope they stear away from this Speed Run Concept. Puzzles and Exploration should be more prevalent. I would rather take my time getting to a Boss that is Ifrit level hard than blindly run to a boss as easy as Ogre and Batraal.