Peter G. Davis is ready to declare 31-year-old tenor Juan Diego Flórez a star, after his New York debut. “There has been no shortage of agile tenors recently to handle the florid bel canto repertory, but none I’ve encountered offers this kind of total package. Flórez’s accurate articulation of coloratura and the sheer fizz of his passagework, without loss of tonal quality or definition, take the breath away.”