What a strange article, his first issue: "I am happy to be contradicted with data, but too often I see this issue being discussed with links to web articles citing other web articles, finally citing studies which suffer from the issues listed below. Maximum output at work is traded off" while he him self does not cite a single scientific article
In fact, I found few scientific articles on the subject and the few that I did find were not relevant (for some of the reasons in the text).