December 6th, the Iraq Study Group proposes what would become the surge.
Exactly 5 days later, Bush met to discuss the plan.
January 10th the plan was announced. That's 35 days since the proposal. By then, over 200 US servicemen had died. By March, 2 months after the vanguard had been deployed, the results were not excepted, with large number of dead, May 2007 was the record of US troops lost for 2007. The last two brigades got there in April and May.
By the time the violence started to decline, September 2007, almost 11 months had gone by.
Probably more as the White House was likely aware of what the Iraq Study Group was working on for months.
Also remember that the Surge itself was not the approximate cause of the turn in the war. The strategy was a radical shift away from seek and destroy to protecting local communities and having troops stay in those communities for extended periods of time as well as forming strong ties with the Awakening councils. Flooding the country with additional troops alone did not produce the results we wanted.
Does Afghanistan have a workable strategy as well? Flooding the country with more troops after the blatant fraud in the recent election will not send a good sign to the Afghans.
Iraq War troop surge of 2007 - Wikipedia, the free encyclopedia
U.S. death toll in Iraq passes 3,000 - USATODAY.com