@Wall Flood
This is not a gambit from me. There have been a number of forum posts where various statements have been made about flute material. I simply want to be sure that anyone reading the forum sees that there are differing opinions about the materials from which flutes are made. I also have seen a number of claims by very reputable flute makers that consist of marketing hype which is dubious in nature. I simply wish that all flutists understand that there are many reasons why some flutes have a different sound or response.
Your are certainly entitled to your beliefs and I won't try to convince you otherwise myself. However, I will offer the links below which refer to the publication archive of Dr. John Coltman who is both a flutist and a physicist. Several of his published papers are specific to the topic of flute materials. Since the early 70s, he has conducted research on flute acoustics and published his results in professional journals and papers.
The John W. Coltman Archive at Stanford Univ.:
https://ccrma.stanford.edu/marl/Coltman ... nHome.html
Effect of material on flute tone quality:
https://ccrma.stanford.edu/marl/Coltman ... n-1.06.pdf
Material used in flute construction:
https://ccrma.stanford.edu/marl/Coltman ... n-1.08.pdf
Like you, I do not necessarily believe every "scientific" claim unless it is proven beyond doubt. To my knowledge, however, Coltman's research has not been countered or refuted by any other credible scientific studies. That is why I asked if you had any factual basis for your statements; I would be most interested to read any scientific studies that contradict Coltman's findings.
Before buying a flute or headjoint and choosing the material from which it is made, I would suggest that every flutist owes it to themselves to make an informed choice by reading the two articles I referenced above. Forearmed with this knowledge, they can then decide for themselves what they choose to believe.
Lastly, polite/civil discussion or discourse is certainly welcome on the forum and no one will be banned for that.