Yes, I was also told the 2-4 oz figure by RK for the Oso ore, though based on recent information I think that may be his non-standard "precious metal content" that includes the weight of silver, instead of gold equivalent. If it's 2-4 oz of mostly silver, it could be worth only $70/ton, which is about 1 g/t gold equivalent, rather than 2-4 oz of gold equivalent, which would be $3400-6800/ton.

There are some pictures of the Oso pile in the photo gallery here. There were also at least a couple of PRs that mentioned switching to the Oso ore. I really don't understand why they switched back to the Belle Peck stuff.