Overall? With NTs?
On the surface, they do vary. Everyone has the different expressions; some are wiser, some are friendlier, some are not. Some just gets differing circumstances, and so different outcomes of expressions.
Therefore, my experience with other people in general do vary.
Collectively, they are more or less stuck at this belief depending on their cultures -- that includes foreigners themselves and to one another...
There is still this suble types of walking on eggshells, the one that seem to be rather too necessary to many social interactions.
The very one that makes NT social masks lighter, and what most autistics struggles to reconstruct themselves and ended up constructing a too heavy fit of a social mask if one tries.
But this is getting better now. At least from what I can tell from here.
But in the inside, they are no different from one another -- even from NDs, even to the worst of humans.
So many of them are just as rigid, even if they are intellectually open and are different. Fewer of them are truly open beyond that, and I'm not even among that fewer numbers.
It's just the rigidity of many is deem as 'appropriate' and very enabled, therefore not very noticeable. At worst, it's an open secret of sorts or a stereotyping shame.