I don't think it's fake. I think that the video they showed was the "now it's running" phase but no mention or view of what was needed to get it to actually run. Most likely not a nice GUI/copy and paste Launcher file but possibly a method that isn't viable for the average user.
So I do believe they have done it, just not in a way that they can release to the masses with an easy process to trigger/use the exploit.
fake or not suitable for public release after 3 months of hyping it mean the same thing to me.