> agile is a culture as much as it is a project management methodology,

Agile is a culture about project management methodologies, which unfortunately is extremely resistant to actually adopting methodology that reflects it's overt cultural values. Largely, IMO, this is because the agile community has been very bad at operationalizing the “over” statements in the Manifesto into mechanisms by which the right side items are subordinated to the left side items. This results in (for the first statement in the Manifesto) either dysfunctional interaction and demotivated people from constant conflict resulting from the absence of processes and tools, or the adoption processes and tools in a manner which does not respect people and interactions, merely because someone has labelled the tools “Agile”.