50 knts over the fence is much safer..
Both my wife and I spent a few hours with Mike Seager in the factory 12 before we flew our own aircraft. It is important to recognize that the RV-12 is very much an RV and Mike really handles all the Van's models as a pro.
At the same time you really have to understand that the 12 is so darn efficient an airplane that you'll use way too much runway 'in float' if you come over the threshold faster than 50 knotts. If you have 3,000 ft of landing surface 60 will work, but if you have less or obstacles on approach you had better slow it to 50 or you'll scare yourself! The 12 flys very nicely at 50 on approch over the fence; even at gross weight.
Jay and Carrie