Because it goes to our credibility, the progress or lack thereof, and the competence of those conducting the WoT. I think President Bush maintained credibility, in my eyes, by not whooping this up as much as others...it was a victory, but he didn't overplay it, IMHO.
Pep rallies are needed to rally the masses. I don't see this as a egg in face. What one tribe thinks of the others ranking is pure politics.