Nice summary and appreciated. However I doubt that Rhodium assay is the answer since that information Noront could easily have kept the lid on.
If it's a leak the most likely source would be from the camp. There are a lot of people up there and passing through, helicopters, supplies in and out etc. that keeping a lid on rumours from there is much harder to do. If a leak came from low level without much detail it could explain smaller nature of the price move.
Of course it could just be investors thinking it's about time for something to be released and getting in early at very reasonable share price. Guess we'll find out next week.