"War of the Flea" in Iraq

Even as the Iraqi Army is catching up with modern warfare, US forces are going back to school themselves. This is from Reuters:

In small steps and without fanfare, the U.S. Army is adapting its training to "the war of the flea," the type of hit-and-run insurgency that is gripping Iraq, where more than 2,000 American military personnel have been killed.
Counterinsurgency training, military experts say, largely vanished from the curriculum of Army schools after the Vietnam War. It began a slow comeback after the Iraq war, which opened with a massive ground and air assault, turned into a protracted conflict of ambushes, bombings and hit-and-run attacks.

The handbook they're following is "War of the Flea" by Robert Taber:

Taber likened guerrillas to fleas and conventional armies to dogs. The dog is always at a disadvantage against the flea -- he has "too much to defend, too small, ubiquitous and agile an enemy to come to grips with. If the war continues long enough ... the dog succumbs to exhaustion and anemia without ever having found anything on which to close its jaws or to rake with its claws."

The military has gotten alot of heat, especially from Vietnam vets, by their counterinsurgency tactics, which are similiar to failed tactics used in that lost cause. However, it does take a while to go from an equipment heavy, cold war style of combat, to that of a light infantry, anti- guerilla force.