Disciplined Agile just has the same values and principles of Agile, with expanded terminology and additional 3 principles. It replaced working software with working solution, customer with stakeholder as example. This changes in my understanding of Agile Manifesto are inclusive of everything Agile. So, confidently, I can assure Discipled Agile (DAD) 2.0 is one of the Agile methodologies.

From another perspective, Disciplined Agile congested Agile, Lean, Modeling and many other practices into one huge choice based processes framework. It has 4 options of life cycles, that covers iteration oriented, flow oriented and even lean startup based one. I can be provocative and say, Discipled Agile is more Agile than Scrum.

See more details at:
http://www.disciplinedagiledelivery.com/lifecycle/