To paraphrase a famous quote, "all insurgency is local." I would argue, therefore, that there is more than one strategy being implemented, depending on the region. I haven't followed Afghanistan closely for a few months now, but it seems to me there is quite a difference between the strategy in the N2K region and down south (Helmand, Kandahar, Oruzgan) to give one example. I won't pretend to know enough about insurgency theory to try to fit each piece into a particular model, so I'll leave that to others to hash out