I don't necessarily think so. Their core is aging. They don't have the depth they've had in the past. I won't be at all surprised if they're out in round 2. But, the experience/confidence matched up against a self-fulfilling prophecy like the Leafs will make them look like world beaters.
* - for the record, I also wouldn't be surprised to see them back in the Cup Finals, either. Being that battle tested is an advantage.