Tyson around this time fought Cliff Etienne. He was in pretty good shape for that fight and still explosive. Tyson, as far as he slipped, was still one of, if not the quickest heavyweights around.
Jones just didnt have enough firepower to keep Tyson off of him, or size to muscle Tyson around to wear him out. Tyson at some point would connect on Jones probably sooner than later.