In terms of weapons, Robert Griffin III's speed is comparable to a nuclear missile. He torched his competition at this year combine, running the 40 in 4.41 seconds, which further cemented the notion of Griffin's superior speed.
It was the fastest by a quarterback since Reggie McNeal in 2006 (4.35 seconds). Andrew Luck who is reportedly being drafted ahead of RG3, no. 1 overall by the Colts, ran a 'measly' 4.67.
However, the combine is often likened to the SATs of the NFL entrance program and Griffin's speed might not necessarily translate on the gridiron. Track stars usually become running backs not quarterbacks. Griffin knows this and he addresses it when John Gruden asks him if he thinks he'll become the fastest QB to ever play the game. (Gruden's QB Camp - go 1:23 in).
RG3's feet (and throwing strength) have drawn comparisons to that of another athletic QB, Cam Newton. Former Colts general manager, Bill Polian disagrees saying, Hes a world-class track man and as such is a bit of a long-strider and a bit of a narrow base guy, as opposed to Cam, whos an instinctive, natural football runner, a make-you-miss, shake- and-bake guy in a 6-foot-5, 250-pound body."
RG is not that, Polian continued. That said, he has enough shake to beat most defensive linemen. And once he sticks that foot in the ground and goes, its gone, baby, gone. Youre going to have a hard time catching him. Thats unique. He presents a threat thats absolutely unique.