All of those are based on a misinterpretation of this tweet that was withdrawn by SurfaceJP:
Via Twitter, I got a translation of that tweet from @la_riviere:
It says that they will release new information about Surface on the afternoon of the 2nd April.
The Chinese going nuts apparently got back quickly to Japan and the tweet was withdrawn and replaced with this one:
Translated to English:
Quite a difference, huh?
ASCII Japan has an account of what went wrong [Google Translate].