User blog comment:PrinceVinc/Y U NO SAY MIA/SS??? by DuffTime/@comment-3450702-20121009200021

a ping back takes under 1/2 second. Honestly, it's your choice to lose a game because you're too map aware to let your team know, but remember, saying ss is never a negative.

Again, it's your choice to give up a minion or to ensure the safety of your lanes. Me personally expect, for instance when I'm invading their jungle, an ss call and a ping back, perhaps even my lanes coming to help out.

But it's always your choice to let your lane opponent kill your lee :)