A rather telling article in The Daily Telegraph, two selected parts:
The bottom lines are these: Pakistan has gained greater leverage in Kabul, Mr Karzai has drifted ever-further away from his anti-Taliban allies, and the Taliban is no closer to making peace.
Ends with:
Dialogue succeeds when insurgents realise there the costs of fighting exceed any possible dividend. The Taliban are some distance from that awakening.
Link:http://blogs.telegraph.co.uk/news/pr...es-making-war/

Cites another comment:http://aan-afghanistan.com/index.asp?id=1286 which is far more detailed.