User blog comment:Tails365/How to climb the elo ladder/@comment-216.36.26.248-20130320011247/@comment-216.36.26.248-20130320105213

I'm aware AP Yi has counters, but if you play cautiously, you can casually force your opponents out of lane and keep the lane permanently pushed. AP Yi is also good at capitalizing on the mistakes of his opponents (such as standing close to minion waves).

No character is without counter, but finding people who counter AP Yi effectively isn't as common as it is in theorycrafting. And even if you can't kill your lane opponent, you can still farm extraordinarily effectively and wait for team fights, when that level of coordination tends to go right out the window. Just make sure you aren't too close when the fight is initiated.