Eteri girls do prerotate on the ice though on lutz with their feet about 1/2- sometimes more. and not just Eteri girls , many ladies and men in general.
A lot of people pre-rotate, at this point its not penalized extensively so no one focuses on correcting it. Shcherbakova can rest assured though that if her quads are downgraded to triples based on her prerotation if the technical panel is judging fairly than there are a good number of other skaters who should be having their triples downgraded to doubles.
