Shifting PerceptionsRespondents, who consisted primarily of winemakers and those in cellar production, were asked to rate each type of closure on a scale from 1 to 5 (1 being very negative and 5 very positive) in terms of their perception of: price, performance, consumer acceptance, ease of removal and overall (see tables below). Natural corks lead in the "overall" perception category, and screw caps were slightly up in 2005. For almost every attribute, perception ratings of scre...