My TLDR is: 1. Scrum has been the most successful of the Agile methodologies, and people who are having trouble with Agile are often specifically having troubl

My TLDR is: 1. Scrum has been the most successful of the Agile methodologies, and people who are having trouble with Agile are often specifically having trouble with Scrum. 2. Scrum is all about moving to an iterative development model. 3. If you move to an iterative development model without the development practices to support it, you will regret it. 4. Scrum doesn't say anything about development practices, so lots of Scrum teams try to do iterative development without the development practices to support it, and they soon begin to regret it. 5. XP is an alternative since it does specify development practices that are designed to support iterative development. I can't speak to the validity of the author's argument since I don't have any direct Scrum or XP experience, but I think your summary you're not doing it right - you need to be more agile - do it harder!! doesn't do the author's argument justice.