Ok. I went to check out Quiet Riot last night as it was a free show at the beach. While the band was pretty good, only the drummer is an original member. To me it seemed like a good "cover" band. Now bands like Y&T have only one original member, but it is the singer and main guitar player (Dave Meniketti). But bands like Quuensryche, Skid Row, Warrant all have most of their original members, they do not have the original singer.
So, in your opinion, what make these bands a "cover" band? Original singer? Original member(s)?