Hypothetically, had the insurgents read about Tet, but not read the fine print that it was a tactical disaster for the insurgents, they might try to emulate it. Do you think that was the insurgent 'surge' in attacks on the Green Zone about 2-3 weeks ago? On the one hand, it was a surge, and it looked liked it was more drama than effect (not to denigrate the people hurt and killed). Like they were trying to generate media effects (like Tet).

On the other hand, that implies a higher degree of cooperation that the insurgents seem willing to go along with. The insurgency seems more viral, with only general directions to the various groups, than coordinated. It seems to me that each Arab man sees himself as an emir or maneuvering to become one, and cooperation is low in their priorities unless directly threatened or there is a clear path to advancement involved.

The most important piece is that Tet wasn't a turning point until some know-nothing talking-head on the news said 'quagmire'. It drives home the importance of getting our message out accurately, and early.