Because its casualties havent been splashed all over the front page of the main stream newspapers and cable news shows.
"The total number of enemy attacks has fallen for four consecutive months, and has now reached levels last seen before the February 2006 Samarra mosque bombing. IED explosions have plummeted to late-2004 levels. Iraqi civilian casualties, which peaked at 3,000 in the month of December 2006, are now below 1,000 for the second straight month. The number of coalition soldiers killed in action has fallen for five straight months and is now at the lowest level since February 2004."
http://townhall.com/Columnists/RichLowry/2007/11/12/quiet_victory
"The total number of enemy attacks has fallen for four consecutive months, and has now reached levels last seen before the February 2006 Samarra mosque bombing. IED explosions have plummeted to late-2004 levels. Iraqi civilian casualties, which peaked at 3,000 in the month of December 2006, are now below 1,000 for the second straight month. The number of coalition soldiers killed in action has fallen for five straight months and is now at the lowest level since February 2004."
http://townhall.com/Columnists/RichLowry/2007/11/12/quiet_victory