For comparison, here's a compilation of snippets from Blue Angel demos that Cyndi recorded between 1979-1980. The song "Never to Be" isn't her; it's Britt Savage who replaced her in 1981 after she left the band. It was another case of mistaken identity since a lot of people thought it was her, until I asked Lee Brovitz (BA's bass player) and Britt herself about the song.
you can hear similar vocal nuances here, since they were from the same time period.