Too good to be true isn't it. Of course you'd be less confused if you incorporated some facts into your reasoning. For the 15th time, it's testwork! They are trying lots of different methods or permutations to perfect the extraction method.
That 50% ratio isn't based on the one sample. They've got other results that show a similar ratio of PGMs to gold.
This latest development is bloody awesome. Worth grabbing a few shares just in case it is true surely?