This is a potentially momentous success, but look a bit beyond the science itself. Instead of rushing out to publish, the researchers first "couldn't believe that their method had worked" and that only after "repeating the procedure several times over several months" were they convinced that they had actually done everything correct.
That is exactly the way that science needs to be done. First of all doubt your result, and check every aspect that you can think of before going public. The bigger the result, the more important the internal check. After all, if you don't find the mistake, someone else will.
So, kudos to these folks on their success, and kudos for checking your result multiple times before going public.