I think what we've seen in the transition is that we used to think of the global oil supply curve as being—and I don't know how you'll get this in the transcript, but I'm an economist drawing with my hands—a vertical inelastic supply. No matter how much prices went up there wasn't that much extra oil.
What we see now is not just due to shale oil, but also with technologies like we see in the oil sands with deep water, etc. The supply curve globally has flattened out. If you get into synthetics it's even flatter than that. We have much more oil available at a variety of prices than we would have thought possible in the past. It's just a change in the market.