I lived in Seoul 2012-2013. Generally I think this post is accurate. Here are some general observations from my time there:

- there's a small but growing startup community growing there who were very welcoming to foreigners.

- you only see web developers with macs. A basic 13" MacBook can cost close to $1800 there.

- already in 2013 there's was a huge surge of people with these larger phones in Korea.

- trends travel very fast in Seoul. riding the subway, you'd see a smartphone game become popular and die out over a 2 week period.

- mass transit is very efficient. Last night I heard Gavin newsome claim that the Bay Area has one of the best mass transit systems in the world. All I could do was laugh.