In a 3-2 count against Astros righthander Rhiner Cruz, Cespedes lifted a 97-mph fastball over the left field wall in the sixth inning. Including tonight’s game (as of the eighth inning, Cespedes was 1-for-4), Cespedes is 3-for-24 (.125) with a hit by pitch, no walks and six strikeouts while serving as the Aguilas DH.
http://www.youtube.com/watch?v=i_xDVWfTkuc
Seems to me his bat speed is pretty good.