It seems there must be a reason why mouthpieces for some of the major supplier countries are becoming acceptingly philosophical about peak oil, and in some cases seem to be embracing it. My money is on the idea that they realize that the resource can pay them even more if they cry shortage and dribble it onto the market for decades.

I don't know. A long term price in this range is not in the supplier countries interests. It will and is stimulating the search for alternatives. One of the ideas mooted for replacing oil may turn out to be valid. I think a price of approx $50 a barrel suited them best in the long term. It looks like the reason they don't increase supply is because they can't.