I think most people probably do realise that. I understand you're probably not in a position to tell it all just yet either. Seems like it would be in Facebook's and your own best interest to clarify the already-public information (if not more), though? Kill the speculation before it starts to echo.
Speculation on why the original deal fell through, for example? It's fair to say that speculation has already started, as the original article shows. I presume it has no basis (the fair presumption at this stage), which is why I think it's best for Facebook to just put the facts out there.
Your example is flawed as there is circumstantial evidence here to start speculating from. People aren't making up random ideas, they're filling in gaps. It's not right, but that's what happens when only part of the story is known.