Well, the manga stated that Sakura surpassed tsunade, but to me, it didnt really feel that way..with her new powerup, it didnt look like she would be able to beat tsunade, it felt like kishi said that just to give sakura a little bit more attention. It feels like this is happening again, but then with sasuke. But if Kishi really means this literally, and he wants us to believe that whatever tobirama/orochimaru's opinions are, are 100% facts, it would be a little lame to me, because Madara is a legend, and his rinnegan/mokuton/EMS combination was supposed to be the ultimate thing, and now sasuke is gonna surpass that and lose to naruto which both make madara's legend status fade away..