I'll take a shot at that: (oops, should have read gsdreamer's post, but I'll just confirm what he said...)
When we came down the mountain on Saturday after the trip to Silver city we stopped at the mill.
CQ took us into the mill and we got to go up on the shaker table again to see it in operation.
It was markedly different from the year before. Much less visible gold and silver coming off and a lot more of the "waste" black sand.
CQ explained that they were "super concentrating" the ore by running it through the process about 4 times. This way, they were getting much more of the PM out of the ore than they were before. I think there was extra concentrators involved too.
So, IMO, ALL of the concentrate that comes out of the mill now is "super concentrate".