Yesterday's article, "Are ratings pointless?", in the San Francisco Chronicle provided an in-depth analysis of the 100-point wine rating scale. The short answer to their rhetorical question is "no" but let me explain how I think about the use of ratings and the key underlying factor driving consumer interest in them.
Why wine consumers want ratings - Reviewer "triage" is a proxy for their own effort
The sheer volume of fine wine produced annually overwhelms the individual consumer's ability to determine what to buy based on his or her personal preferences. By leveraging the time of reviewers with respected credentials, the resulting ratings and wine descriptions provide an invaluable service by helping prioritize buying decisions within a finite budget. The consumer's goal is spend his or her money wisely and to achieve maximum drinking pleasure while avoiding outright buying "mistakes."
Determining which rating sources to trust
Rating sources don't have to be preeminent professional reviewers like Robert Parker, Stephen Tanzer, or Allen Meadows. As my post of only two days ago highlighted (see What influences your wine purchase decisions?), "wine-knowledgeable" friends are the most frequently mentioned source of influence (72%) followed by wine retail staff members (61%). The consumer only needs to perceive the rating source as having a good probability of having made an accurate assessment. This probability assessment or "trust index" is essentially the result of a personal calibration process between the individual consumer's subsequent experiences with wines reviewed by a given source and the level of agreement between the consumer's opinion and the source's. That's why friends and retail store staff "compete" well against professional reviewers.
Personal taste ultimately trumps professional ratings
The same post I referred to earlier also notes that 87% of consumers agreed with the statement "I trust my own taste more than I do the wine critics." While there are "score chasers" out there who seem to fall into the other 13% bucket, this extremely high agreement rate indicated that most consumers use wine ratings as a mere input to their purchase decision process.
Use of professional ratings by retailers
Most retailers selectively present only the highest rating, from whatever source they can find, to provide a positive buying rationale to a consumer. This has always irritated me as the source may not be one I "trust" most for the type of wine in question, and even if it were, more information, including divergent opinions from other trusted sources enable me to make a more informed purchase decision.
That's why Vinfolio shows multiple rating sources whenever we can find them such as the example shown on the right for a $200+ bottle of Kistler pinot noir. Even if you trust the Wine Advocate, the wine divergence of views on this wine (from Burghound, Tanzer's International Wine Cellar, and the Wine Spectator) will interest you. Upon reading the text reviews (achieved by clicking on each box when on our site), you may choose to discount selected opinions or not.
Your opinion
Please feel free to add your own comments on how to use wine ratings successfully.