Does DevOps drive agility, or does agility result in DevOps?

This is a really good question, and while there are some that say you can be successful achieving a DevOps culture without agile, I’d like to see it. 

I agree with this article in that what we currently believe is DevOps is an outcome of agile evolution, and teams evolve a DevOps culture as a reaction to a need.

This development is much the say as initial agile implementations, best practices merged and became what we know now as scrum or kanban.

I expect that DevOps culture will coalesce into a delivery extension of common agile frameworks, and hence there can be no DevOps with no agile.

Your thoughts on this article? http://devops.com/features/devops-drive-agility-agility-result-devops/