The problem happens when something is perceived to be greater than, in reality, it can possibly be. Penzance, Stonehaven, Balkan Sobranie, and a few other blends get referred to in ways that go beyond the simple reality that they're just tobacco blends, not supernatural artifacts that appeared within a flaming bush, and thus objects to be worshiped.
So when the subject of myriad reported heavenly miracles is found to be of this earth, people call it overrated, because it is. Not the fault of the blend. It's just tobacco, not the Second Coming.