Board Thread:Naruto Discussions/@comment-24312338-20180719230811/@comment-36697734-20180825102137

Sakura did not pass Tsunade in any way save for Medical Ninjutsu, maybe. That statement was made to convince watchers/readers that Sakura was not just a damsel in distress. When Kakashi said that Naruto has surpassed him during the early parts of Shippuden, did you really take it to heart? No, not really. It's just a self-esteem boosting compliment.