[YourGrace]

I wouldn't hire this person either if I had interviewed them.

When I think of a team player, I think of someone who recognizes that a team is composed of people with various skill-sets and being a team player is helping to enable the other teammates to grow at their job. Being a team player is about contributing to the team outside of just your code such as teaching the strategies you use, and your mental model for solving problems you face. It sounds like the author expects everyone to discuss a spec, and then go into their cave and solve the problem by themselves which seems very individualistic to me.

Overall, if you don't want to contribute to the overall growth of your team, than I wouldn't expect those teams to want to work with you either.

Maybe off topic, this article seems like it's main purpose is to drive traffic as the author is selling an ebook.