Well from the looks of the 3D model the vein/sheet is a solid 2.5km long and goes down for at least 450m. So even though the intercepts aren't 20m wide its only because of the nature of the structure. There is an insane amount of gold there from the looks of it. I'm still reading it all and I think it will take a little to digest but you're right, this is massive.
Cheers.
Gamblor.