I found this article interesting, but it had way more bark than actual bite.
It argues that time management training doesn’t work because most people get inundated by email when they get back to their desks.
At the end of the article, the author backs off the startling claim he makes in the title, because that’s not really the point he’s trying to make. Instead, he’s right about the need for companies to change the expectations around email, and the importance of creating alternate methods for communicating urgent messages.