I would not like to make a choice between the two, especially this early in B's career.  However, the day of a single running back carrying the full load in BCS football is over, and has been for a while.  Jon is right:  Change up running backs, at least two, are the order of the day.  And, Iowa really does need a running back who can go the distance, partly to score more points and partly to keep the defense thinking.  I really like B's ability to catch the ball out of the backfield; I thought he played really well on Saturday...I was at the game and watched a replay later.  He will take a beating, maybe more on pass blocking than running the ball. I, too, did not think he looked all that fast.  I am ready to change my mind and certainly teh 23 yard run was a good example.  Also, a couple of times I saw him wait, wait, wait and then burst with really good effect.  We have GOT to run at least one other running back, maybe around 25% of the time.  Can't wait for Saturday!