Well, since it was a special, promoting the movie, they used good animation.
With the movie being released, the studio can now focus its good animation on the anime. Next week, episode 272 has iffy/stiff/less than decent animation, but the week following that(episode 273-274) will have amazing animation because its its a special, its a 2 part episode, AND its about ino-shika-chou vs asuma
Point is, naruto Shippuden never consistently has good animation. Its the same stiff crap until something important happens. the only reason Naruto vs Pain was stiff and then shitty, was becuase Movie 4 was being produced at the same time as the fight