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Don't forget that when Marin Alsop was hired, the musicians in the orchestra publicly complained of the choice (on record because they were not given more say). A private letter, however, was leaked: "90 percent of the BSO musicians oppose [Alsop's] appointment," because "she either does not hear problems or--because her technical limitations prevent her from fixing them--that she ignores them." They came around after they met her and she explained her vision for the orchestra.
http://www.citypaper.com/news/story.asp?id=14843
Marin has mentioned in interviews how careful she needs to be when conducting. Garden variety motions are interpreted completely differently when she does them. Strong motions seem overly emphatic, border-line angry. Gentle motions make her seem weak. She's not talking about her critics here, either. She's talking about the music she elicits from male and female musicians.