Yes, probably. In Italy roller shutters on windows are ubiquitous, and keeping them shut all the way down will make it much easier to me to sleep until noon or even later; whereas if I go somewhere with no shutters at all it's pretty hard for me to stay asleep long after dawn (though I'll feel sleepy again in the afternoon). (But personally, no matter how dark my room is, it would be nearly impossible to sleep nine hours more than three nights in a row or so.)