They are in the background all throughout this video. See 0:28 and 2:28, etc. I'm sure there's other videos of them actually using the sleds as well. I went into youtube and literally opened one Countdown to Kickoff video from 2010. I'm sure this won't stop people from parroting something they heard on BTN, though.
EDIT: OK, second video I open shows them using the sleds at 0:35 too. It is pretty hilarious (sad?) how far some people will go to criticize the last coaching staff. http://www.youtube.com/watch?v=s0qgFoYynDA&feature=related