The article you're referencing was written at the request, and with the help, of of our lead site survey engineer, as he had seen the High Density setting implemented incorrectly in quite a few locations. High density settings are meant to help move large amounts of client traffic quickly, which should all be originating from the same area (in the same room). If you could share the links to the other documentation you're referencing, I can try to clear up any confusion.
