Board Thread:Theories and Speculation/@comment-32742265-20180119154238/@comment-732150-20180126003345

Nope. He copied it, and used it, but he struggled with it at first. He had to focus on taijutsu training to make proper use of it, to use it at least as good as Lee was with it. When Lee saw Sasuke in his fight with Gaara, he was impressed at how in one month or so Sasuke's taijutsu training allowed him to use what he copied more effectively.