Dunno if it's our personal perception as well...
Truth is, if you have this inferiority complex don't be surprised
if people treat you this way, and I'm not sure if one has the right
to complain.
Case in point look at Singapore Airlines, where they actually have
a policy that prohibits special treatment for westerners... however
in pratice it turns out that the westerners often turn out to be
the ones that are polite to the staff, respond to them, and
generally be the good customer while the Singaporeans tend to have
this unfriendly, you-are-my-servant mentality.
When we look at ourselves do we not realize that when it comes to
being gracious customers... we have not yet really deserved the
treatment we demand?
In this case can we really blame them for appearing to respond more
the western customers? Granted some people have this idea that
everything western is better, but I think most of them more or less
treat everyone equally... but they are not treated equally by their
customers in return.