Secondly, Ulduar will not be tested like a normal instance. The testing will be in phases and only happen according to the schedule Blizzard lays out. They'll announce times when certain bosses will be available for testing, and that means that only during those times will those bosses be open for play. This also means that Ulduar will initially be closed on the PTR.
But think for a moment about what this does – it means that we won't be seeing strategies and other guides immediately available upon release of the patch (or in most cases before the patch). It means that world firsts will actually mean something again, and it won't just be a rush to see who can log onto the server first.
That is quite big and exciting news. Daelo also lets us know a few other things.
Need more news about Ulduar? We've got updates, previews, speculation, and everything else you need to know about the next big raid coming in patch 3.1. If the Titans are hiding it up there, we'll tell you about it here.