'Agile' has 'crossed the chasm' as evinced by Forrester, Gartner, and the British Government's Cabinet Office and Public Accounts Committees. Following Everett Rogers model of 'diffusion of innovations' we have already passed Early Majority and are now into the Late Majority phase, as evidenced by government adoption, an emphasis on metrics such as ROI, and a growing backlash against 'Agile failures' by skeptics.
In this presentation we look at the causes of Agile's failure, what we can do to mitigate the risks of failure in our own projects and organisations, and where the future of Agile might lie.
 "Crossing the Chasm", Geoffrey A. Moore, 1991, ISBN-10: 0-06-051712-3
 'Agile Delivery Network' paper for Cabinet Office, 2010, http://j.mp/sCINCc
 'Diffusion of innovations', Everett Rogers, 1962, ISBN-10: 0-74-322209-1
 'Agile Software Is A Cop-Out; Here’s What’s Next', Mike Gualtieri for Forrester Research, 2011, http://j.mp/v3LbMt