I'm sorry I didn't RTFA, but I wonder if there's a correlation / causation issue here. Did the "agile" projects fail because they were agile, or because their project management methodology was prescribed by management than is higher up than appropriate. Maybe they happened to choose agile because it's the flavor de jure at the moment, but it wasn't the "agile" that was the problem exactly, as much as the undue influence of the wrong layers of leadership.
