I am having this same exact issue for over a week now. I was told it is problem other CenturyLink users are having. I was referred to this thread here: High latency - centurylink! Mainthread - #17 by Caterpepi
I have not noticed any high latency at all on my end. I have random disconnects that usually happen after changing zones or entering/leaving a dungeon.
Is this a separate issue?