Hey salt,
The refresh time is about 5 seconds on this particular cam.
I was so baffled by this I watched them for about 15 minutes, the two of them walked around, took photos etc, then hopped in the car and left. I thought, if there was a third person who maybe went and sat in the car, but the refresh time, I should have seen one of the car doors open or something like that.
I have some more pics coming through in a new post from the abandoned hospital soon.
Keep rockin' on Salt