In my opinion, we are more than holding our own on Reddit (both WowServers and VanillaWowServers), I even have the feeling (please, don´t laugh) that we already attracted MORE players than we can handle on launch
I expect thousands of people and more-less regular server crashes during first couple of days
That is, the hype worked much better than I expected. Key problems now are server capacity/stability, handling of expected DDOS and especially low leveling content. Giving well polished/scripted experience to new players is crucial, and I hope devs will spend at least a couple of days testing and fixing, say, at least 1-30 content even further. That seems to be relatively small but very wise investment in the future.