The article is behind a paywall, so interested to see the data, but it's really key to understand who is excited. It's a leadership race, so the crowd is already the CPC faithful. Good news internally if he is exciting the party faithful, but the other polls still show overall that PP, Charest and the rest have a net loss to the current CPC polling in more voters going to vote Liberal.
Might just be impossible to do with the CPC as long as there is a (overly vocal) Socon and tin foil hat wing that keeps bringing up red lines for a lot of voters. People can dislike abortion, but it's still legal, and the spectre of CPC trying to ban it again will continually erode votes.
Harper fairly ruthlessly suppressed those folks and had success. The others (Including O'Toole) tried to please all of them, and was in turn not trusted by swing voters to not start throwing them bones and chipping away at hard won freedoms.