lots of spread teams are killing it with smaller rbs. TCU has a few, Baylor, Mizzou, etc. Its not really about top end speed as much as it is being quick and able to cut. Being able to advance the ball is the name of the game. Its a good change up to have. Mizzou took Marcus Murphy and Hansbrough who were about 5'9 175 out of high school and made them pretty good players. Keep hearing ppl say RDA wont be good. He does what Devrin was supposed to do and has done it way better on the College level. He catches from out of the backfield, works in the slot, gets a few carries and is dynamic in the return game. He has done it in some big games like Pitt, VT, Louisville, Duke, Vandy, etc. Players like RDA, Perry and Bruce will really help in this system.