I'm a tank such latency doesn't hurt me on the fights, but boy do I see it. Everyone will stop for 2-3 seconds then resume, usually all across the map from where they were. I see people teleport out of the way of attacks, or completely dodge an attack then die nearly 5 meters from where the attack actually hit.

So far lag has caused 90% of my team wipes, by estimation. 10% are bad players.