http://www.op.gg/champion/yasuo/statistics/mid
(Head to the "Counters" tab)
Looking though Yasuo's matchups, Yasuo has ranging from high to EXTREMELY high lane kill rate against his lane opponent for basically all matchups against mages, including those who theoretically is supposed to hard-counter Yasuo like Malz (Yasuo has 62.86% lane kill rate over) and Xerath (Yasuo has 65.43% lane kill rate over).
The only mages who escape this fate are Zoe and Orianna. Zoe because she's fucking Zoe, and Orianna is the safest mid lane mage in the entire game. And no, I don't count LeBlanc as a mage.
Outside of assassins who has higher lane kill rate over Yasuo and someone like Jayce who just owns all aspect of laning, Yasuo basically has no peer in mid lane. And even then, assassins like Kassadin (44.85% lane kill rate against Yasuo) and Katarina (34.21% lane kill rate against Yasuo) would still disagree if you were to take it as a generalisation that assassins collectively have an upperhand over Yasuo.
B-but, we can just acknowledge that Yasuo is a lane bully and surely his power only goes down and his presence never strong after the laning phase? Lmao, what you smokn'?
And people think this is okay.