It's really 50/50 with me. I've learned to just GTFO as soon as it appears on the floor. Anything later and I will get hit. It's seriously annoying out in PVE when a mistimed escape from an AoE could spell death, but I have adapted to it.

However, in dungeons, when I think I am completely out the marker and still get hit, I often get told by other members in my party that on their screen I didn't run out of the AoE until the very last minute. So sometimes it could be an issue with lag.