>Anyone who works regularly with people from other countries will recognize this right away. Your brain goes into a sort of fuzzy recognition mode searching for meaning rather than critiquing flaws.

This is an interesting reason. I have always noticed that the British and Australian accented voices sounded better. I though that perhaps it was easier to emulate their pronunciations.

Would the inverse hold true for British/Australian people as well? Does US English sound the best to them in TTS applications?