Here on the CENTCOM website is Sgt. Sara Wood's report on General Petraeus' confirmation hearings, "Petraeus Supports Troop Increase in Confirmation Hearing," January 23, 2007, American Forces Press Service:
“The objective will be to achieve sufficient security to provide the space and time for the Iraqi government to come to grips with the tough decisions its members must make to enable Iraq to move forward,” Petraeus said. “In short, it is not just that there will be additional forces in Baghdad; it is what they will do and how they will do it that is important.”
And it hasn't happened.