It's probably true that the leadership was non existant. Then again, we're talking about shroud where for the average PUG on Khyber, there's a tried and trusted (Yes I know it's slow) script which allows people with basic or non existant leadership skills to form a group and complete 99% of the time.
Anyone who joins a group where there is little instruction or voice leadership in the first 3 parts should really be preparing themselves for the usual ritual of slow buffs and gather at the portal for masses before part 4. The same ritual of saving earth (Or the next best available leutenant) in part 5 also applies.
Sometimes it's frustrating to wait for these little scripted rituals to take place, but if you join a usual Shroud PUG rather than a guild/firends run, it's what you should be expecting. The point being that it can take only a small deviation from the usual script to cause mayhem and a one way trip to wipesville.