Nystrand: 20K per week

Masters swimmer Erik Hochstein posted an interesting question over on the Timed Fianls site: www.timedfinals.com/.../ Basically, Stefan Nystrand swam the 2nd fastest 100 m free in history last week in Paris (47.91). Stefan says he trains 20K max per week in the pool with only two days per work of dryland. He swims either all out or easy, nothing in between. So what do you think? Is this possible? Are swimmers and coaches too hung up on putting in yardage? Is this "less is more" philosophy something we'll see more of? It is certainly appealing to Masters swimmers who usually have a limited amount of time to train.