Game Mechanics: deathtouch not instant

[DoucLangur]

Severe bug: Deathtouch mobs do not instantly kill whoever gets on their aggro list. I have seen Keeper of Souls melee the first to engage almost to death before finally deathtouching him.

Just now, I pulled a Spiroc Vanquisher with divine aura, and I ran for 12 seconds, thinking I was safe because I didn't get deathtouched. Just as I reached camp, the spiroc lord deathtouched me - he had CHASED me all the way before - and wiped our raid.

Please fix this, that is very game breaking - I assume it is the same bug for ALL deathtouch mobs...