Probably fake, Kishi wouldn't let Sasuke get hurt.
Seriously, did he even sustain any major injuries during his battle battle with itachi & Diedara? Besides running out of chakra & stamina?
What do you mean? At the fight with deidara he summoned that huuuge snake just to be saved from explosion. He can't summon that again, it died. So, he has a disadvantage at summoning monsters at the moment...
And at the fight with Itachi, Itachi didn't use his 100%, he could have easily avoided at least one of Sasuke's attacks, and when the fight was over, I remember Sasuke fainted and almost dead. AND without Itachi going 100%.
All i mean is, yes Sasuke is very powerfull, but he's not at Itachi's, Pein's, Jiraiya's (and a few others) level...Let's be realistic...
And I agree at the Kishi part. A lot of discussion has been done here for the likes and dislikes of Kishi...