I generally agree with this; it is important we distinguish between hard fact and popular opinion. I wouldn't go so far as to declare that the facts are all non-existent. There are things that are definite and we now for sure; what we do not know is how they line up to A:) a future TES title and B:) whether or not BGS's current game is that future TES title. For example, we know for a fact that Bethesda holds several 'Skyrim' trademarks. And the recent renewals signifies a definite interest in protecting the name.
If we're not careful, deprecating every piece of information as illusion will ironically lead to this position itself becoming a defense for the ludicrous and imagined.
One clarification to the above post: What was retracted was the book's original description from Waterstones and Amazon. The Reviewers version of the book was never retracted. As for whether or not it is fact, without verification this requires a leap of faith. However, I personally regard it as fairly factual (it may not be verbose fact but it contains definite fact). Del Rey is too respectable of a publisher to fabricate such detailed information; they had to know something from which to synthesize what they said.
Announcing games at conventions is not their style. They could always change how they do things, but I wouldn't look for anything to come from these events.