I think its pretty obvious that Kakashi has obtained the Mangekyou Sharingan. There is no way Itachi would act as shocked as he did if the weaknesses of the Mangekyou Sharingan were available on the Wikipedia of the Naruto world.

Besides, it seems to fit in also when Kakashi tried telling Naruto and Sakura near the beginning of Shippuden that he had learnt a cool new technique.