More than twelve. Try a couple hundred. 20% over time is a rather large increase.
1: The dispenser in TF2 was mainly used for ammo/building, the heal was lolworthy and only useful in canceling out burns.
2: Good healers can still cleric stance for the same amount of time with a STR tank.
I do agree that speed running is pointless now due to the decent AoE classes not having decent AoE anymore. That has nothing to do with STR/VIT and more to do with gameplay/balancing changes. This sentence makes no sense in the overall context of the thread.
No they won't. No cleric healer is out DPSing a stance dancing/STR WAR that knows what's up, hate to break it to you. You won't even come close.