User blog comment:QuantumFeint/Tanky meta... or is it?/@comment-24420226-20150426224436/@comment-25247575-20150426230610

one item vayne does so much % hp damage that if she can kill a support in 12 autos she can kill a one item tank with roughly 12 autos unless they have thornmail or frozen heart. that is why vayne is popular.

the reason they say "late game carry" is some champions scale harder with items then others. caitlins passive is not effected by crit so it does not scale with crit chance; on the other hand jinx's rocket extra damage does. some champs scale better with attack speed then others. kog'maw has % damage on aa, but corki even though he does true damage on each auto does not build attack speed because weaving spells is stronger on him.

and any adc with a short range is just worse at 6 items because they are in more danger unless they have a very powerful dash like what lucian had when his e cost 0 mana and he could dash every 2 seconds.