Rascher mouthpiece question

I have often heard that Mr. Rascher said that he was opposed to the "new" smaller chambered mouthpieces being used for classical music. Now, I understand that he said this in lessons, master classes, etc, but I have also heard that he wrote an article about this or gave a speech. I've never been able to find any concrete info about this, so does anyone have any information about where/when this happened, or was it just a philosophy that he espoused?