The study, funded by the National Cancer Institute, was looking for reduced risk of breast cancer with red wine. What they found was that more than 14 drinks per week correlated to an increase of 24% in breast cancer incidence, regardless of type. The authors were careful it appears to not make the mistake that many others do in interpreting the data, however, which is to extrapolate backwards from 2 drinks per day equalling 24% risk to 1 drink implying a 10-12% risk. The reason it is a mistake is that there is no way of measuring self-reported behavioral data that accurately so the effects of a drink a day are essentially unknowable. This is especially true because there are so many other studies showing that moderate drinking is beneficial, in terms of cancer risk and many other health factors. And of course there are few people who really only drink one type of alcoholic beverage and in the same amounts every day.
The authors did recommend that women should limit drinking to one per day, which is probably sensible especially if you are in a higher than average cancer risk category. I'm still in the red wine camp, at least where healthy drinking is concerned.