In the next paragraph he mentions (to paraphrase) even medium format is a compromise - if you really want to slow down use large format, heavy gear that takes forever to set up and use. Maybe that was added after you read it?

Quote Originally Posted by Bruce Watson View Post
From the article: "But if you really want to impose limits, a twin-lens reflex camera will force you to take your time."

I was hoping that someone who'd bother to write an article like this would know more. Clearly the author knows nothing of large format photography. Sigh...

If you really want to impose limits, try LF. Outside of press cameras it's nearly impossible to do LF fast. The essence of modern LF is slow and deliberate.