Per Adweek, consumer shopping habits in response to the recession will continue after the recovery.
The article mentions some research/testing, but it would be interesting to see more. The gas price example for the car business is based on advertising promoting mileage. The manufacturers have stepped up production, but the sales ratio to less efficient vehicles is not what you'd expect.
The recession has caused people to rethink their habits, but it will be interesting to see how "sticky" they are when consumer confidence is much higher. Consumers may feel like they're sacrificing now, but like changing a diet, it's not always effective long-term.
Buying habits will probably never be the same because companies have to "reinvent" themselves a bit in a recession. To go backwards might alienate new customers.
The key may be refining and defining your brand for your core and new customers. As the economy improves, you may want to test some older strategies that don't deviate too far from your updated positioning.