The asteroid itself will miss us by quite a bit, but no celestial rock is alone in its transit of the solar system. Something the size of DA2012 is going to have satellite rocks surrounding it. I wouldn't be surprised to see more of these stories throughout the day today.
Good point. Also possible that the asteroid is not a solid body but "rubble pile". The earth's gravity might shatter the pile and send part of the rubble toward earth. This is especially true if the rubble pile has any spin.