There still seem to be a few reports of problems but make sure you have rebooted your computer and modem/router.
I do think ZOS need to make a clear announcement about the situation including clarification of where the exact issue has been given that the NA servers have clearly been a problem for a lot of players these past few weeks. A player, I forget who, did indicate that there were major network outages reported in certain US states yesterday so it's possible the servers aren't wholly or even partly to blame but without a clear statement from ZOS as to what they've been fixing and how it's impossible to say. Just saying "we're on it" and "it's fixed" really doesn't cut it any more.