Yep it's pretty awesome to get absolutely gamebreaking lag in raids. At first it was ATT for me which I fixed by killing their modem functions and having everything divert to my router. Since the patch though it's just been shit NA datacenters where I'm fine all day and then "suddenly" it's raid time and my connection in raids just outright shits the bed. I've dealt with lag in raids before and usually it wasn't that bad, but without something like WTFast now, lag ends up being me sitting there for 30+ secs seeing the first add on t10 still alive at 60% health.....to everything catching up and the group being on the 3rd add and us being so far behind on dps now that we may as well just wipe.
Mumble and everything else work perfectly fine though. Resetting my router/modem does shit all and after a few wipes due to the lag it gets to the point where we may as well not even try that night because we can't even get to a point we need to practice more. Me lagging, combined with others getting constant hiccups at the same time, does not make for a good time. I have WTFast now for a few more weeks, but if they do nothing with the servers in the meantime, after that few weeks is up I may as well not even try anymore.