Are Taliban abandoning guerrilla tactics in Pakistan conflict?

http://www.miamiherald.com/692/story/1050746.html

Reading about the Taliban abandoning guerrilla tactics and fighting army to army gives me a bad feeling. For the only reason I can think of doing this is to increase civilian shield casualties to the point where they can turn the populace against the Pakistani army and the government which would be a terrorist tactic on a new scale.

This doesn't sound good to me at all. With at least one million refugees heading in the direction of Isalamabad and the surrounding area already, how many of these (refugees) are Taliban fighters in disguise? How long before there are serious disruptions or out right warfare in Isalamabad too?