Someone makes a prediction of what's going to happen and then it doesn't happen, doubt their ability to predict.
Someone claims in-depth knowledge of a subject and can't get basic info right about it without checking, doubt their in-depth knowledge.
Apply it to whomever you like.
So how do you explain 3.0 for the end of this year - I know you'll say it wasn't a promise, it was target/slated/internal date/an estimate/a goal.
But seriously - knowing what we know now about the switch to Lumberyard and 2.6 release and all the other crap behind the scenes how could anyone even hint at that with a straight face?