Well, the article is focused on consumer web design. It appears to be someone thinking out loud and coming up with some fairly standard advice.

I agree an information-dense approach is warranted when people re-visit a site many times-- what you would call professional/industry design? But even then, the minimalist principles are still valid. You don't want to clutter with unnecessary stuff, but you _MAY_ just have more stuff.

Do you have a compelling example of effective non-minimalist web design?