How many bottles of a given producer does it take to get a good idea
of their quality? I have tried several bottles of Vietti wines
(Piedmont, Italy), and, despite the high ratings often given to them,
I have not found them all that exciting for their types (Dolcetto,
Barolo, Barbera, etc.). Several bottles were in fact poor. Could this
be a shipping/storage problem?

http://www.vinocibo.com/raccoltaviettiapril04.htm

As I say, they keep getting good reviews, but I keep getting so-so
bottles.