The latency was fixed 100%. Check your connection or data center.
What people don't seem to understand is that the animation on the ground lasts slightly longer than what the cast time is. You have to be out of the big bad red aoe before the cast time finishes. Also the server side latency delay used to be 300 ms last patch, meaning if you got out of the aoe .301 seconds before the cast timer finished, you actually got hit by the aoe. Now it has been reduced to .100 seconds, which you means you need to dodge .100 seconds before cast timer finishes.
The average human reaction is something like .12 seconds, so 99% of people will never be able to ever see the lag.. that is unless their connection is actually lagging. Only very twitchy people will be able to feel the difference, and even then there is good reason for having the delay at .100. I have gone from getting hit by titan VERY rarely when I was out of aoe (like 2-3% of the time) to never getting hit by any aoe ever because its all a joke to dodge and my connection is good.