The challenge, the risk of counter-tenor singing, still fairly young as a revived technique, seems to appeal to modern audiences; it is a peculiar type of virtuosity just by virtue of the technique. It is only natural that the the counter-tenor revival took off in the 1950’s and developed in parallel with the historical performance practice movement. That was Alfred Deller who helped it take off, who started as a boy in a choir in the 1920’s and as an adult helped the Purcell revival in singing alto, and gave recitals of Italian madrigals and Elizabethan songs, but also singing contemporary opera, creating the role of Oberon for Benjamin Britten’s A Midsummer’s Night Dream.[1. See J. B. Steane writing for Grove Music Online.] Philippe Jaroussky cites Deller’s very distinctive voice, and also James Bowman, who too inspired Britten, creating the role of Apollo for Death in Venice, as voices he listened to in forming his own, and forming as an artist, Bowman especially. Bowman gave his farewell concert in Paris only last November, and many good recordings exist of Deller. Now with some hundreds of professional counter-tenors in the world and they inching up into the soprano range, the hole in the Baroque and classical “instrumentarium” left by the extremely distinctive and castrato voice which tickled so much enthusiasm in audiences — and composers — in the 17th and 18th century is filling, or at least better circumscribed, without needing to resort to a false general preference or dichotomy determined by fashions between counter-tenors and sopranos en travestie, in recital or in opera, or between counter-tenors and contraltos.
Maybe the best thing about the early music movement is the way it has gotten main-stream artists, as they used to be called, to take music written before 1750 seriously. Handel’s operas are now staged across a range that extends from historical reconstruction to the most advanced stagings. Operas that used to be radically cut, rearranged, transposed, or just ignored, are now afforded textual validity and theatrical viability. On the performance side we now have the finest young singers and players involved.