Personally, I'm getting extremely sick of it. There are at least 3-4 threads on the front page of General (on the WoW forums, not here) constantly about "Titan will kill WoW", "Blizz is abandoning WoW for Titan" and "All the good devs are on Titan". I'm really sick of it.
First off, Blizz is still making content for WoW, and has said that WoW has a long future ahead.
Second off, Blizz has said that Titan is meant to run alongside WoW, not to replace it.
and Last, and most importantly, Blizz has said NOTHING about Titan yet, except that it will be a new story world. People are constantly talking about how good and how much better than WoW Titan will be, yet Blizz has said nothing about what it's about. I don't get why people are so freaking stupid.