I'd think this survey is not as suited to old-timers like myself as it would be for young people who are just about to become enthusiasts.
When I started out using computers, whether a keyboard was mechanical or not was not something you thought about. Many keyboards just happened to be mechanical, and you just noticed that some felt nicer to use than others. And we got our first keyboards as part of a family computer, or as a Christmas present. Thus: there was no buying experience, no building experience and no expectations on a keyboard for it being "mechanical".