I am using Gnome 3.6 and I am quite annoyed by the login screen when my computer wakes up. The new implementation in Gnome includes two steps. First you have to hit Esc or click and drag upward (slide), so the big clock disappears, and then enter your credentials. I am interested in removing the first part.
The behaviour has been changed since GNOME 3.8 so you can just type in your password even though you still see the screen shield. There is no need to press Esc or slide the shield.