As WM and merlin have said, that is just the most ridiculous thing to say.  It would be funny if it wasn't so sad.

One thing is to measure two amps and say that the one that measures better sounds better.  People may disagree but it's a rational argument.  However, suggesting that you can tell that an amplifier will measure badly just because it doesn't use global feedback is absurd, not to say extremely arrogant.

How do you know that Sim don't have a way to make a low distortion amp without global feedback?  Even if TD has measured amps and found that, generally, no global feedback produces worse null test results that doesn't mean that someone else doesn't know how to do it  .

This kind of fundamentalist narrow mindedness is really staggering.  First it was "only speakers with metal drivers can sound good", then "only multibit DACs can sound good", now this.

Einstein said that the speed of light is constant and nothing can travel faster than it.  Now João Magueijo (a Portuguese physicist working in London University) is showing that may not be true afterall.  Nothing is written in stone.

Michael.