I have heard two items, the same as when you handed them in, however who knows if that is in fact correct.
Still, if you take 10 people who would have done the drop off, and put them in the line for Cinderella, it does make the line that much longer and that much slower. Its seldom a 'could you sign this', often turning into 'lets just get a picture' with the photo person hoping that you will purchase it once seen. To me it just clogs up the line for those who actually wish to do the meet and greet.
I have only lined up once and that was for Captain Jack. Enough said.....