It's opposite for me. I have hard time sleeping at someone else's house. I have to lay down for hours before I get to sleep. I get best sleep in my own room.
In response to both parents of this comment, my first reaction would be that "of course" it's personal: maybe your bed at home is not that great, or a neighbouring mine makes sounds that don't register consciously anymore but still keep you up. But then again, in my experience it is a personal thing beyond a person's environment. I know people of both kinds and the location does not seem to matter.
It's often the case in non-exact science studies that the results are difficult to reproduce. Besides the obvious "they're not called exact", it's interesting. What is this caused by? Would, in this example, some people lack the 'feature' of sleeping with half a brain?
I suspect it's because I lock myself in a hotel room and can expect not to be disturbed. It becomes my private space.