What do you refer to though? The article or the guidance?
I give a journalist some extra space if they say they have seen a document and then they write about it if that document is one that is expected and it is highly likely that they may have been sent a copy.
Particularly if they are reporting that the guidance offers little constructive change to the current guidance when someone like Sandy Brindley is involved in any way in its creation.
What is more likely? A media outlet writes a fake feature on a new guidance, or they have indeed been sent a copy of the guidance which is yet to be published? Particularly if the paper involved has a 100 year history and is part of a major publishing congomerate so likely to suffer significant reputational damage if they were found to fake something.
So, "Do you take everything shared on twitter as truth when the person themselves sharing it admits they can't find any evidence?"
I do what I used to imagine most people would do, I look at the source and evaluate whether it is likely to be the truth before I post. I also ask questions to clarify what it is that people cannot find because posting suggesting that fakery is involved.
But then, I guess if my motivation is to portray a group of people as being gullible and believing 'fake' news, I would not bother with any of that. I would just post something like, oh I don't know, "It's probably fake then isn't it."