At last a usefull standard from ISO:lmao:
Analytical wine tasting is impersonal and objective. Professional tasters and informed amateurs must agree on whether or not a wine is ripe, balanced, typical of its origin and a number of other criteria established by those who judge the wine.

Tasting, therefore, needs to be conducted with a systematic approach in order to analyse the technical components. Professional tasting is done under strict conditions, including identical glasses. ISO 3591, Sensory analysis - Wine tasting glass, provides a "common standard". Everybody uses the same type of glass to taste the wine. In a series of different glasses, the judgement would be very different. The ISO wine tasting glass is recommended by hundreds of professional wine tasters throughout the world.
http://www.iso.org/iso/iso_cafe_wine_tasting_glass.htm

From the ISO link (http://www.iso.org/iso/theisocafe/iso_cafe_wine_tasting_glass.htm): Analytical wine tasting is impersonal and objective. Professional tasters and informed amateurs must agree on whether or not a wine is ripe, balanced, typical of its origin and a number of other criteria established by those who judge the wine. Tasting, therefore, needs to be conducted with a systematic approach in order to analyse the technical components. Professional tasting is done under strict conditions, including identical glasses. ISO 3591, Sensory analysis - Wine tasting glass, provides a "common standard". Everybody uses the same type of glass to taste the wine. In a series of different glasses, the judgement would be very different. The ISO wine tasting glass is recommended by hundreds of professional wine tasters throughout the world.