Even if I could, I suspect it would be pointless; you're taking an argumentative stance throughout. How about you just post your sources to the contrary and that will be fine.
Yes, words are important, this we know. But I don't find anything that says extensions are not looked at. I think at least some users like to know what types of pages they're viewing, so the developer argument is a bit over the top. The extensions can be used to hint at dynamic content to average users also: php>html, for example, as not every web surfer understands or knows about URL rewriting and might equate htm* as static content.
I think it's great that you found a way that satisfies your needs, , but don't think it was worth hijacking the thread over.