I think the best thing to do is to assume that opinions are often based on personal preference or prejudice, and do not necessarily reflect the facts. They are not the best evidence, although of course sometimes useful.
On the other hand, Strangeways has carried out some actual tests, and is not here to convince others of an opinion, but to show us the evidence of the damage and of his test results and Stern's response to the issues.
Strangeways is an expert and has consulted experts, so debating that the damage can't exist is really not the way forward.
