I haven't read his book, but if anyone is curious on these experiments, you can read more on the following books (In fact, the article seems a mash of both of them):
Blink: The Power of Thinking Without Thinking - The author mentions experiments where people exposed to more agressive or relaxed interactions can react differently and many other situations (similar to the money/cloud backgrounds examples).
How to Win Friends and Influence People - Describes interaction strategies to avoid conflicts and create trust (such as the letter example).
Blink: The Power of Thinking Without Thinking - The author mentions experiments where people exposed to more agressive or relaxed interactions can react differently and many other situations (similar to the money/cloud backgrounds examples).
How to Win Friends and Influence People - Describes interaction strategies to avoid conflicts and create trust (such as the letter example).