There is a really interesting interview with the project lead for Black Mesa on Rock, Paper, ShotgunWhat Happened To Black Mesa: Source? Part 1
andWhat Happened To Black Mesa: Source? Part Two
where they talk about (at one stage) the trailer and the mistakes they made in releasing it when they did and what it did to the fans and then in the final question they ask even though it was a mistake to release that trailer and info can they give any idea about a target window and the response they get is "soon-ish
To me, soon-ish means probably not this year which is sad, but then a month later they release these screenies.
Did they just make another mistake, are they trolling us or are they actually going to release the game some time soon? (Soon as in months and not years)
To me the only acceptable answer has to be a release soon otherwise they're project leader is an idiot and we've got no hope of ever seeing the game.