Money has degraded Peak Oil. Never did M. King Hubbert show a price chart. The price effects of peak oil may exist but they are besides the point. Price effects are always manipulated ones. In May 2009 the US Senate released a report indicating that regulations previously preventing speculation from being able to drive the commodities market had been relaxed, allowing three times as many shares to be held by a single trader.
But it doesn't matter. The term "peak oil" was coined by petroleum geologists coming from academic backgrounds where if you said "peak oil" they would think "production rates" not "prices." Because of this the term was not made foolproof against perversions which economists and consumers would warp it into.
In 2008 when the price of oil went above $100/barrel the term "peak oil" was suddenly interesting to the unwashed masses. When the bubble burst, oil production rates didn't rise as the price fell, they remained consistent with the fact that you can't get crude oil out of the ground any faster than geophysical limits permit.