Thanks for the first rate effort and information, Tolero, Cordovan and Turbine!
Trust me, you all want them to get this exactly right. They're doing this the right way. They made it a top priority, assured us they would get us information as soon as it was available, and have waited until they were certain of their information rather than prematurely risking misleading or misspeaking.
I am now absolutely sure everyone will come away satisfied after this is over, and very soon. With such a broad ranging "live-fix" as this is likely to be, even if its simply some form of compensation, they do need the time to get it right. So far, this is VERY fast by any reasonable development and support standards.
As for in-game World Announcements, opinions vary, but I strongly suspect as many people would be annoyed as would be helped by constant in-game interruption.
as for whether something takes 15 minutes or 12 hours, some things just take a certain minimum amount of time, and that's just reality. You can ASK to have something sooner than it can be done, and it can be PROMISED sooner than it can be done, but it will always take as long as is needed to get it done, and that includes getting accurate and up-to-date information and getting it out through the right channels with the right approval.