You should attend one of my classes. I ask what Agile is and then tell everybody it has no meaning at all. It's just a big blanket term we use to re-wrap a lot of that older stuff (and some new stuff too).

In my opinion the biggest problem Agile has comes from the people who like it. Skeptics are fine. I can show you this stuff works. But people who did "Agile" one time and become cheerleaders and set in their ways can be insufferable.