In 1991, the US immediately knocked out Iraq's television broadcast capabilities. This time around, we didn't. To see why we didn't, and how it has hurt the war effort, read this New York Times article.
I thought that the US military knew from the beginning the power of controlling information. After all, one of the first things that the military did was drop pamphlets all over Iraq. So it's indeed curious that they left a tool of such known potency in the hands of the enemy.