The load 2 systems that you are starting to see, started in Germany and the first time I saw this system was at the European Shotgun Championships in Terni Italy in 2003. It is a good system for those who don't have time to practice much and still want to load at a fair rate of speed. My person experience, and opinion is that while it can be done fast, it will never have the flexability of the weak-hand reload, and it requires that the shotgun be taken out of a shooting position to load where as weak-hand allows the gun to be loaded at the shoulder in a firing grip.
Like so many things, most Europeans have gone to the weak-hand reload, and now we are going to the German system....go figure. B.T.W. if you want to know the orriginator of this type of loading it was George Moskop of the German IPSC Standard Semi-auto Shotgun Team. Kurt Miller