On 'demand destruction' is there any evidence world oil consumption has fallen?  As opposed to slowing growth?

I was struck, f'rinstance, by the rise in US SUV and light truck sales.  Not a harbinger of falling gasoline consumption!

As to prices.  In a world with very price inelastic supply and demand, you would get the same kind of price volatility.  I think you could fairly argue that the previous price of oil was 'too low' rather than the current price is 'too high'.  There is a minimum price (around $40-45/bl) which triggers new entrants such as Canadian oil sands production-- which is, indeed, happening.

The fact remains oil prices are below their recent peaks, below their all time peaks (1980) by a considerable margin, and consumption, AFAIK, is still rising.

We might be close to Peak Oil, but the market isn't telling you that yet.

The 'demand destruction' I am talking about is in poorer countries, not (yet) in the OECD.  And even in the USA there was a (small) response to the high prices last spring.  The recent SUV sales are a rebound from that drop, not a real increase.