No doubt. Unfortunately, the only promo that reflected his WCW skills was his WWF debut w/ The Rock.
Despite him saying how bad WCW was, he really looked like he was having a good time during his run as CW/TV Champ (Obviously, by Starrcade he was on his way out). He literally had dozens of golden promos that hardly anyone on the current roster (including Jericho himself) could touch today either due to lack of talent, being fed exactly what to say, or both.