I agree that the insurgency could be related to SH, but I think that is mostly unlikely in that the insurgency appears to be part of a power struggle and there is no way SH will ever be in power again, much less be alive after the next year.
So, I stand by my statement that the initial US invasion was well done and its mission was indeed accomplished. If there are any facts to support that the initial invasion and removal of the prior administration was not a success, I do not recall them
However, as pointed out in that article, it is the administration's lack of a coherent or realistic plan after the toppeling of SH that has lead to the current sad state of affairs we are dealing with now.
In any event, W and his administration have consistently said the entire campaign in Iraq will be a long struggle and the quotes Goldie gave only refer to the initial invasion, where, again, history suggested we would be met with little opposition, which sadly was not the case.