Now Tim has posted his thoughts and discoveries on Landmark Education. He's done some good research on it, comparing and contrasting Landmark with Sceintology. Their biggest common trait seems to be the unique adaptation of language, so that certain words and phrases gain peculiar definitions that can only be clearly understood by people who have spent time within each respective organization.

I went ahead and posted a comment describing some of the advantages I see in such usage, despite the barrier it creates between members and non-members. I also briefly described what I believe to be the biggest downsides of Landmark's operation, and why I ultimately got out.