Good technical point but they did at the time argue that the war plan was ill designed and faulty, not enuf troops, quagmire...etc RAT stuff.
They may actually have a point about post war. I personally think we forgot to dot a few "I's" in that plan but we're adapting, learning and improving.
We were completely surprised by taking less than 6 weeks to complete the conquest of Baghdad. The plans counted on those several weeks to get stuff set up and in-theater. It also planned on coming through Turkey, thereby grinding up the idiots in the north (Sunni triangle).