Bernhard Wittmann, Sven Ramelow, Fabian Steinlechner, Nathan K Langford, Nicolas Brunner, Howard M Wiseman, Rupert Ursin and Anton Zeilinger, "Loophole-free Einstein–Podolsky–Rosen experiment via quantum steering", New J. Phys. 14, 053030 (2012).
I quickly looked at that paper, and while it is said to have a high overall efficiency I also noticed mention of coincidence detection... so I wonder, is it indeed "loophole free" as is suggested, or would for example De Raedt et al's simulation program give about the same results?