I think t-mac and gilbert arenas probably have the quickest first steps in the league. honorable mention: lebron, flip murray, allen iverson, steve francis
Gilbert Arenas, Dwyane Wade, Flip Murray, Tmac and Iverson I would say Francis, Marbury and Baron too but they always do stuff off the dribble.
Vince's used to be so fast, but its still good. AI and Starbury have the quickest first step in the L
One Kobe, here's the 2nd. Kobe, Iverson, Marbury, Parker, Nash, Lebron, and whole bunch more. But the quickest overall, has to be Iverson IMO.