Drawing from personal experience, the fastest/quickest player I've ever seen up close and in person is Allen Iverson, without question. Real life vs. t.v. really changes your perspective. AI is obviously not as quick now, but 4, 5, 6, 7 years ago, that man was unbelievably quick. By comparison, I don't think (of the players I've seen in person) Telfair, Barbosa, Parker, Lue, or even Rondo is as quick. However, the only time I saw Rondo in person was in game 2 of the NBA Finals (flew out to Boston from the west coast - AMAZING experience for me) when his ankle wasn't right (right?), so maybe Rondo would be up there.