I think that is just prudent warning not to go bezerk thinking that this is gleaming with copper and gold. IIRC, the same cautions statement about 'visible' mineralization shows up every time the company talks about such things.
I don't have any stats on it and could be very wrong, but i think that every time the company spoke of visibile mineralization in the past the assays turned out VERY well. DDH 398 comes to mind. Most, if not all, of our mediocre cores don't have such qualitative descriptions.
I lean to the positive when I see these statements in the NR.
Sure would be a great place to put a starter pit.....no digging required to get to the good stuff....just start digging and paying back in a BIG hurry