It is not imposible to dodge AoEs. I think everyone had done it some way or another. But since the response of the server is slow you probably have to move out in the instant the AoE appears if you delay just a tiny micro second you wont dodge it even if your chaaracter made it out of the zone in time before the enemy finish casting. So that 0.3 or 0.5 (for those who are farther way from the servers) have a huge impact on hard fights.