User blog comment:TheTobarMethod/Why is Mid one-sided?/@comment-5002283-20130315130736

Why mid is supposed to be most counter sensitive: mids are generally the most burst-like and have better waveclear. therefore they have more time/opportunities to damage and kill the opposing player. because there is more action, a counter is more clearly effective.

However bot and toplane are (almost) as sensitive to counters. But generally this is less noticeable in kills, but more in denying. Because the lanes are a little less intense. For instance think of a yoric against someone without/little sustain constant poke into complete denying but because of manacosts probably no or very little kills.