I think the Rondo/Walk it thing comes from the fact that in so many Pre, During, and Post game conferences Doc and Danny both said they need to run it more, push the pace, etc, but that in games, instead of using long passes, the c's would grab the rebound, short pass to rondo near their own paint, then rondo would 50/50 run it or slow-trot across half court.
He's fast, and he's good on the break, but he certainly does not relentlessly push the ball unless it's a clear 2 on 1 or something like that. If not an obvious obvious fast break, he really does prefer to slow it and work his dribble in the half court.