NYU doesn’t use grad students for voice instructors for VP majors (Steinhardt). They get full time faculty or occasionally very well qualified adjuncts. D (the studio art major) took voice lessons for the past few years at NYU. She had grad students, but considering they were free lessons and that she wasn’t even a music minor, I had no complaints. Despite being an artist now, D has had a lot of vocal training and felt her grad level instructors were excellent.