This is my first post, so I do not expect you to believe me straight away, but here is something I wanted to share withe you guys.
I have a rather good inside contact that told me about all those clients that were invited from all over Europe to attend a presentation in Berlin. He then specifically said that the purpose of this presentation was to launch the new IBM 970-based Powermacs.
(I don't know anything about the specs though.)
Knowing the guy, I'm pretty damn sure this is true.