I'm happy they came out and clarified what games are coming to Xbox since it's not always clear. Sony can and should do the same thing. It's smart marketing and anyone getting irked by it shows how effective it really was.
Tell one title that wasn't clear and also why it had to be informed minutes after the show?
It was not clear if something is a timed exclusive, full exclusive, or multiplatform when it came to 3rd party games. Sony seems to change the wording or way it tells us this each time I watch one of these shows. I read plenty of comments during the show and after asking if a certain game is exclusive or not.
Why does it need to be informed minutes after the show? Because it's the best time to do it while people are still talking the games. It gets people thinking about Xbox. It's smart and effective marketing.