Swap Higher Interest Rate for Lower Loan Amount?

Redfin readers Red, Brandon and David recently suggested that as this crazy market worsens, it might become possible to get your mortgage lender to write off part of your loan amount in exchange for a higher interest rate. At first, this seemed nonsensical to me. What, boost my interest rate, when I’m going to have to pay on this loan for more than 20 years?
But Red explained that ”nobody actually holds onto a loan for 30 years anymore. People either move, or improve and refinance.” As always, Red is correct; the average California mortgage turns over after seven years, either because of sale or refi, according to the California Association of Realtors.
“If the bank discounted my mortgage to yield a high rate, I’d jump at it, then pay it off. It’s not like money in the stock market has been a great idea lately,” Red said. There are times when cash is king, and I think we are about to experience that again. Banks may be willing to write down existing balances to get the money back.”
I’m still not sure I understand this. Is the idea that since you’re likely going to pay the whole thing off sooner than later, it’s better to get the loan balance reduced? (Photo: jenn_jenn on flickr.)