Somewhere I've read that while conventional gas is like pushing all the air out of an air matress, shale plays are more like, well, farts. ;P Peak oil is not an energy crisis. It is a liquid fuel crisis.
If they are going to be flashes in the pan, there are going to be a lot of very disappointed companies out there. Coverage in the local press indicates productive lives of over 10 years for these fields. Rework of a field is less expensive, as it involves reuse of the original vertical shaft. As the Dutch said while fighting the Spanish: "It is not necessary to have hope in order to persevere."