User blog comment:Tails365/Phantom Dancer SV Statikk Shiv/@comment-6486964-20130503031728/@comment-8439853-20130503102547

It depends more on waveclear imo. Once laning ends the the team basicly gets put on "pause" whenever the adc splits off to farm since there's alot less damage to pick off objectives or opponents that's out of posistion. Static shiv is one way to make this period shorter, especially on carries that doesn't have that good AoE like Ashe, Vayne, Ez, Draven, Tristana, etc.

It's also quite good on Ashe due to the extra burst it adds to her passive mid game.