[apcragg]

I'm also not convinced that they're even out of Far-field. That looks like a roughly 5m dish, which at 10GHz is still in the radiating near field at 1km. I wouldn't be surprised if the main lobe is entirely incident on receiving aperture. That's a neat demo but it does not demonstrate truly radiating power between two distant points. They've essentially built a fancy a wireless cellphone charger.

60% is also almost certainly not total system. A portable antenna like that by itself, with no path loss or other losses, would likely have an aperture efficiency of about 60%. A planar patch antenna like the one used to receive would be similar.