Can Afghan forces bring security when Nato leaves?

In a recent article by Paul Wood from BBC News, it is mentioned that starting in July of next year troops will soon be handing over control to Afghan security, stating "The American surge will start to ebb away in July of next year. The first provinces - or parts of them - will be handed over to Afghan security control in the first half of 2011. It will be a gradual process. First the Afghans will take the lead in partnered operations, then Nato will progressively step back, moving from "tactical overwatch" to "strategic overwatch".  According to US Secretary of State, Hillary Clinton, "Our goal, which is the goal set forth first by President Karzai... is to have full transition to Afghan security by 2014."  But, the real question on this global issue is, are the Afghan forces/security ready to take control?
According to globalissues.org, in the article, "Afghanistan: Time of Transition," it is stated that, "Afghanistan is suffering from a variety of perennial problems: a weakened to incapacitated infrastructure, the complete lack of a viable banking network and legitimate currency, the limited authority of the central or appointed government, and the segregation of the country into semi-autonomous regions governed by warlords."
My view on this issue is that Nato forces, in particularly the U.S. has been in conflict with Afghanistan for over 10 years plus and I think that the U.S.'s oversea campaign in Afghanistan has already been over extended in the amount of time at war. The U.S. lead invasion of Afghanistan had it's forthcoming reasons, but knowingly from prior knowledge that the country was already in dismay and turmoil, the U.S. must have foreseen that this war was going to last not years, but decades. If the Afghan forces have the true heart and strength to defend their own country from forces that challenge a strong governing power, then it may be possible one day in which Afghanistan can be a flourishing country once again.
Hopefully, one day, there will be peace in the Middle East, إنْ شاءَ اللَّة, "God willing."