If I acted shocked and/or surprised to hear this news, it would be just that - an act. This is what happened with previous DLC packs... not pinning all the blame on Bergman, but he would go onto assure a release date/schedule, then wouldn't live up to it. Then about a week and a half ago, he assured us an August release for Lonesome Road and called everyone "paranoid" for thinking otherwise/doubting Bethesda and Obsidian.
Well, can you blame us for the paranoia with your track record, Beth/sidian? I love you guys (mainly Bethesda, Obsidian not so much) but I thank God, time and again, that id is handling R.A.G.E 'cuz it means it'll get done, lol.
That said, the delay was anything but unforeseen. It could have been written in stone, notarized by the President of the United States, dipped in bronze and passed out to every man, woman and child... and the Bethblog would still show up a week or two later and write "delayed, ttyl!" I'll still buy it, as I still want to see what happens in it (even though it would be better if it acted out like Broken Steel and extended the life of the game and got rid of the definitive ending (in an open world RPG, no less).