It never gets much consideration IMO is the impact of technology. I fully understand the law of diminishing returns but some of the most productive improvements had to come into play at some point.
I don't understand how this would not add both to peak production and URR as what ever the (____)became widely accepted. The increase in production should generate somewhat of a addition to the curve.

I'll venture into hand slapping territory and speak on DelusionaL's point.

If there is a impact of new technology on the HL result for Texas, wouldn't this impact come into play earlier on a Saudi HL and result in an increased stability of the curve compared to the Texas HL? Am I correct in thinking that Saudi oil came 'that much' later in the game?

A kid with a question should also show up with a toy in hand, so hope this at least is new:

http://www.energyandcapital.com/consumption.php

Very cool! Thanks.