Gheorghiu!!Radvanovsky and Goerke are the only two sopranos today I would get excited to hear. I did hear Goerke as Norma years ago but before her voice really got big. Her high D in the trio was jaw dropping, though. You would have to pay ME to hear Netrebko today, although she was delight 25 years ago.
It turns out that Callas was definitely a champion of Farrell.I wonder when Callas heard Farrell. I doubt she would have praised her had she not actually heard her.