"Representing 55% of the production and cropped at 35 hectoliters per hectare, Cos d’Estournel’s final blend in 2010 is 78% Cabernet Sauvignon, 19% Merlot and the rest tiny portions of Petit Verdot and Cabernet Franc. Compared to the massive 2009 (14.6% natural alcohol), the 2010 achieved slightly less alcohol, but also a lower pH, which accounts for its more tannic, backward, huge style. An inky/purple color is accompanied by aromas of damp earth, black currants, blackberries, licorice and charcoal. Firm, thick and super-concentrated, it is another outrageously impressive wine that will require 6-10 years of cellaring. It should keep for 30+ years. It is somewhat 2005-ish in its structure and palate impression. (95-97)."
"While I am not convinced the 2005 Cos d’Estournel will eclipse the compelling 2003 Cos, it is unquestionably another superb classic from proprietor Michel Reybier and his brilliant winemaker, Jean-Guillaume Prats. Made from an unusually high percentage of Cabernet Sauvignon (78%) and the balance mostly Merlot with a tiny dollop of Cabernet Franc, this superb effort requires plenty of time in the bottle. It boasts an inky/purple color as well as a glorious perfume of licorice, Asian spices, creme de cassis, blackberries, and toasty oak. This full-bodied St.-Estephe is exceptionally powerful, pure, and dense with a layered mid-palate that builds like a skyscraper. While there are massive tannins, they are remarkably velvety and well-integrated in this big, backstrapping effort that should enjoy an unusually long life. Forget it for 8-10 years, and drink it between 2017-2040.