Its pretty obvious that MS has their own event just like Sony where they will reveal the nextbox and have exclusive coverage. GDC is definitely not a place for such a reveal and its definitely not in line with how MS work as they have never revealed anything about the 360 at this event. Its a developer conference and not something that has enough public appeal for a new console launch.
I do not know anyone who even entertained the notion that MS will reveal their console at GDC. As to when MS reveal the 360 it really does not matter about negative press until that event. As with everything, any press is better than none. Because of all these rumors you can bet more people will actually watch the 360 reveal then the Sony one becuase they will want clarity on those rumors.
It really doesn't matter what people mindset is right now until MS actually come out and reveal what they are doing. Opinions change quick based on facts instead of fiction
