User blog comment:N00bpl0x/Why are some ADCs considered superior to the others/@comment-11349276-20130628091445

Okay, for your first point, you're right. Corki does win that lane. But that's it. Late game, Vayne can beat pretty much anyone, rivalled only by Kog'Maw, Tristana, and Jax. Maybe Tryndamere. That's what makes her so strong. Her ability to reposition, while dealing tons of damage, as well as melting tanks gives her an absolutely deadly late-game presence. Some carries just have much more sustained damage than other carries, or are extremely stong in one area that it overrides their weaknesses. Draven may not have as much damage late game, same with Caitlyn, but their laning phase more than makes up for it, while still having good autoattack damage late game, thanks to Draven's axes and Caitlyn's Headshot. Tristana and Ezreal are just extrememly safe picks, both of whom have easy escapes, and Tristana having ridiculous range. Ezreal has his abilities, which means he wins most lanes as well. He doesn't burst as much as your AP mid, but also has less sustained damage than other carries. While Corki has his uses, his armour shred requires him to get in close, which is exactly where you don't want your carry to be. I'm not saying he's bad, I do play him occasionally, but this is why he's less played than other carries.

Your second point. I would like to say that I love playing Twitch, and that he doesn't deserve the bad rap he gets. But I'll try to explain what the general opinion is. He's squishy. And while most other carries are, too, they almost always have a) more range b) poke c) proper escapes. Twitch doesn't have these. Take Caitlyn. She has all three, as does Ezreal. Draven's a special case, with his axes. While Twitch does get VERY powerful late game, you need a team to keep the enemy off him, while he ultis the enemy team. Yes, he has true damage. But it's DoT, and by the time the full effect has happened, the teamfight's over. He doesn't have the raw damage output of other carries, so he's more of a niche pick in the right circumstances. He does have unique strengths, though, and a good Twitch is a scary Twitch. Just keep in mind that he's supposed to be a hypercarry.

Ouch, I gave myself RSI writing this. :/ Seriously, my knuckles hurt.