I would say the evidence is pretty weak. We don't even have good evidence that crude has peaked, and aspo thinks this won't happen until 2010. And, regardless of hydrocarbon inputs, ethanol and biodiesel are in their infancy and are obviously surging. Meanwhile, ctl and gtl is beginning, lot least in qatar.
otoh, demand continues, especially in asia but here, too. Prices seem unlikely to decline much in the near future.
Actually ASPO predicts that regular oil peaked last year (2005) but including heavy (I assume that includes tar sands), deepwater, polar and NGL takes it out to 2010.

Which measure equates to crude? Neither... Crude is probably regular plus deepwater and polar - which wouldn't be anything like as late as 2010.