When I think about how a player would fit in to the existing offense (or defense), I can see how Ginn Jr. would make a tremendous impact from day 1, even if he doesn't produce right away. In fact, I believe he would make more of an impact for the Dolphins, right away, than any other player (although I still favor drafting Quinn if he is there).
His speed alone demands respect. That means safeties can't inch up and cheat against the run. The have to be conscious of Ginn Jr. flying up the sideline. That should open up the running game a little more, which is our strength at the moment. Ronnie Brown is our best offensive player, and drafting a burner on the outside would help him in many ways.
Drafting Ginn would probably moves Chambers to the slot, where he is more productive anyway. Now you got an all-purpose back, a deep threat, a few possession receivers, and Chambers free to find the seams.
The net result. The offense clicks better, stays on the field, and keeps the defense well-rested. The whole team improves.
And this is all without resorting to a discussion of how many times he catches the ball, or his contribution to special teams. His mere presence would make us better.