I tried a duo queue with a friend the other day. Mind you I am about 1250 elo and he is over 1600. I played ad carry and he played support Volibear. By the mid game, I was fed and he was fed (multiple triple kills plus some others). Basically, from bot lane we managed to bring a fed ad carry and fully carrying support Volibear. It was hilarious.
However, our jungling Jax never did anything... Their jungling Yi camped us and mid -- we ate him, but he ate our mid. And our top Darius fed their Cho. <-- I don't even know how that happened. Needless to say, We lost by a frustratingly close, but inevitable margin. My team was comepletely useless... -.-
So no, I don't think ranked is safe yet.. But will it ever be at low elo? haha