In my opinion WE can mimic NT behaviour. I've spent my entire life doing just that.
Observing, analysing, breaking it down into categories, and then sub-categories, and copying.
Most definately it has made me appear as an NT, but the downfall of doing so was that I appeared to be an NT to both the general population and doctors. Myself doing this may have something to do with why I have only just been diagnosed as being a person with aspergers at the age of 39.
My advice:
Be yourself; don't copy other people in order to "fit in".
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We, the people on the Autistic Spectrum have a choice.
We can either try to "fit in" with the rest of society, or we can be so egocentric that we can't be bothered.
I choose the actor. I observe NT's. I listen to their socializing. I practice it, so in social situations I can just emulate/mimic what is expected.
It isn't natural for me, but it enables me to "fit in".
It is VERY tiring and draining, but at least we can appear like them even though it is an act. Like being on the stage.
They can't see it is emulation, and so we are accepted.