I have completed these a few times, and wondered about the premises of the survey.
I think expectations vary greatly among the public.

I know, for example, when I stay at the Sheraton Grande Sukhumvit, or the
Westin Bund Shanghai, I have great expectations for my stay; and that when the
hotel meets these expectations, I give them a 5 or 6, since they have met my
expectations.

When I stay at the Sheraton Greensboro, I have very low expectations from that
location, and they usually meet those expectations, and again, they would get a 5 0r 6.

That is to say - my expectations are property-specific, and usually based on prior
stays, so the questions becomes meaningless except for those relatively few
occasions when something great happens ( upgrade to Presidential suite), or something
terrible happens ( missed wake-up call, mould on ceilings).