Although I don't disagree with anything specific in this article, there's an uncontrolled variable here that seems pretty crucial: - The Korean was living in A

Although I don't disagree with anything specific in this article, there's an uncontrolled variable here that seems pretty crucial: - The Korean was living in America (albeit a fairly Korean-influenced part of America) when studying English, so there was an immersion factor (however negligible) present. - Similarly, in the discussion of other languages The Korean learned in a non-immersion environment, The Korean has only compared their results to other non-immersion students. Not saying that The Korean is wrong about anything, just that it seems like they can be right, and concurrently immersion can also still be a valuable tool when learning a foreign language.