To digree from the topic … it is not so unthinkable … in Cuba a force of 200-300 fighters was able to overthrow the regime which had an army of 30-40,000. A few victories in battle and there would be a “piece” deal … la Swat … and then before you know, in the larger interest of nation and to save innocent civilains … you have a Taliban regime in Islamabad … hey they might even ask Zardari to be the Calipha 
… after all Talibans have an aversion to democracy … so the army will have a major role to play, so it will be more of changing sides for some generals, time to come out of closet …