I agree, I believe that Cliff's will know details on the release before the general public. Probably not a long time before, but maybe as long as 24 hours before the release. That's just a personal opinion/guess.
But I wouldn't worry about that too much. If the 43-101 isn't as spectacular as everyone here hopes, it's not like Cliffs is going to suddenly dump their position. With what, around 100 million shares plus or minus, if they start throwing their weight around, you're going to see MUCH higher volumes that we've seen for the past few days.
Right now, everyone is just sitting and waiting.