I thought Peak Oil always referred to peak production not peak prices. I would completely expect peak production not to be simultaneous with peak prices as it will take market hindsight to figure out that it has occurred, and then grasp the situation and react. I believe the "market" will go go so far out on a limb based on theory. To push the price higher would require that more buyers/speculators actually believe to that extreme extent the result will soon be higher prices. After all no one bids higher than they need to to buy the oil, so if not enough people believe in iminently higher prices then they aren't going to bid that. Reaching production peak does not entail that price peak will occur soon. Most players probably have no idea how long the plateau will be. When you bet you bet not just on price but on timing too. With commodities it's easy to get knocked out of a postion because you got the timing wrong and something caused a dip before the rise. In the end I thinkit's pretty darn hard to corelate market prices with physical reality as there is far too much irrational psychology involved.
... and that is why prices will tend to "follow" the events. Prices now have (a lot more) to do with rising demand, not falling supply. The price signal of Peak will be extrordinary price movements reguardless of change in demand. Why? Because demand will change too slowly to make a fundamental difference. Supply, on the other hand, will make more than just incremental (albeit constant) movements. The price increases since 1999 can (on a global scale) be seen as a result in increasing demand and not of decreasing (although tightening) supply.