Howard Lederer advocates the same thing. He wrote a column at fulltilt.com on this a year or so ago. IIRC, he said your only objective until the bubble bursts is to turn a profit. Once you're there, everything else is gravy.
Just found it. March 15, 2005. An excerpt:
The payout structure rewards tight play. Most SNG's pay 50% to first, 30% to second, and 20% to third. This payout structure dictates that you play for third. Why? Looking at the payout structure another way might help. Basically, the payout means that 60% gets awarded once you are down to three players, 20% gets awarded when you get down to two players, and the final 20% gets awarded to the winner. If you can just get to third, you get at least one-third of 60% of the prize pool, or 20%. You've locked up a profit, and you have a chance to win up to 30% more. It's only now that you're in the top three that your strategy should take an abrupt turn. Now it pays to gamble for the win. Let's look at the numbers again: 60% of the prize pool is off the table, and moving up one spot is worth only another 10%. But move up just one more spot and it's worth a whopping 30% extra -- that's three times more for first than it is for second. And with the blinds going up, gambling for the win is even more clearly the correct play.
http://www.fulltiltpoker.com/proLessons.php?lesson=1