Corrected entry: On screen, when Amy is blind and surrounded by Angels, the Angels move very slowly. However, in the episode "Blink", the Doctor says that Angels are faster than the eye can see. Even if they were damaged Angels, they would still move much faster than they did in the scene, as other damaged Angels were seen, and one moved about 50 metres in the blink of an eye.
Corrected entry: In "Blink" the angels are unable to move at times when no one's watching them. The explanation being that the audience are. But in "Flesh and Stone" the angels are able to move on screen.
Correction: This is a stylistic choice by the programme makers. In "Blink", the Angels were not seen to move directly - while the choice was made in that episode to present the actions of the Angels as if the audience were observers, this is purely for dramatic purposes; the audience are obviously not, in fact, present. In the later episodes, this conceit was dispensed with, allowing the Angels to be seen to move directly when no character was able to observe them.
Corrected entry: When the Weeping Angels are trapping The Doctor, just before he gets grabbed by one, you can see one move its hand to grab him. (00:11:35)
Correction: If the Doctor wasn't looking at the Angel then it was able to move.
Correction: The angels have fallen for the Doctor's bluff and still think that Amy can see them, so are moving carefully to avoid risking being seen.
Captain Defenestrator