Interesting question Rom, although it would help if you went into a bit more detail.

I haven't read much of anything about Gen Petraeus' particular approach to the current situation in Iraq, but your question does have merit when one wonders...What guidance will he give to subordinate commanders with regard to the vetting process for Army and Police new joins? Will that matter be left up to discussions between DoS and the sovereign government of Iraq? Can we expect to see things turned inside out and start anew?

Even if things are not headed in the best direction, there is still a lot of inertia out there, posing difficulties for the leaders at the helm to make course corrections.