Well I don't know but there are more people living in his house and more animals there than in mine. I live alone, although there are other animals in the house but they are in their own cages and except for one none are in the snake room.
Even then, I would think that there is something more to just quieter surroundings and letting them settle down more because he literally took a snake I had that was off feed for 3 months now, took it home in a little box I put it in, put it in his rack and fed it immediately with no settle in period and it ate two rats. Although I am aware that subtle things affect snake eating behaviour, for example, I had an albino that would not strike when I had a small light on (so I can at least see), and I turned it off with the rat still hanging there and BOOM. Sometimes these things are so subtle we can't even know them or find them. He says that he, himself, never cares about day or night though he just "feeds when he feels like it".