Of course it's too early to say, but i think that is a not surprise we could not detect a 20-30m (10ton) object coming our way, especially now that all eyes are on 2012DA14. Object was too small and too quick and came from the 'wrong' direction. And yes, the answer is increase our early warning budget and seriously work out a planetary protection system, or next time Tunguska2 can be knocking at the door of some populated area for a change (or worse, on the continental shelf, so the tsunami can hit multiple locations).

Lay down your weapons, no reason to panic. This is just the new Pope coming.