I’m not surprised that it’s a fake. In fact, I would’ve been surprised if it were real. The fact that Obama didn’t comply with a simple request to demonstrate his constitutional eligibility to hold the highest office of the land for as long as he did is at least compelling circumstantial evidence that he had something to hide. So releasing it now speaks more to the possibility of having a fake document ready to show to the world with the goal of ending the controversy and silencing his critics.
However, I don’t think Obama has succeeded in this goal. The media bought it, but that's not unusual as they would do anything to promote Obama's preferred narrative. The question is, "would the rest of America buy it?" I think in short order, there are going to be more questions than answers regarding this latest development.