"Agile" is a lie that before 2001 nobody at all had ever done iterative software development, and all software process ideas that came after 2001 are by definition "agile."
"Agile", as with any other buzzword, is not for people who actually understand the details of the change; it's for someone who needs a handle onto concepts that would fly over their heads without a buzzword. Lets stop litigating the term, and move on.