The article itself was anecdotal so refuting it only required an opposing anecdote. While I appreciate an actual study, I'd have to see something specific to São Paulo for it to be interesting or useful to me. I'm not going to come to any conclusions about a specific city based on a study so broad.

Also, the article summary you cited says nothing about punctuallity. It talks about pace of life. Where can I see the full study?

Thank you for the link. The study includes Rio, but not São Paulo, Brazil. I'm not sure why they would skip the largest city in the world that is both in a developing country and a warmer climate, but without including it, it's certainly not a very comprehensive study is it?