I would find that hard to believe given how severely autism impacts some people. Things like being non-verbal, or extremely sensitive to noise, don't seem to be things you can just learn as a child to avoid.
And if the only difference was in childhood learning, you would expect that people with asbergers would be able to learn at least some of that situational awareness later in life. Based on people I know with asbergers, for many of them that is not the case - they never get even close to having intuition about social situations, they just end up memorizing rules and applying them when they seem to fit. Rather than intuitively knowing someone is angry/sad/etc. they use the rules they have memorized to make that determination. It is a completely different way of thinking. Of course this doesn't apply to everyone with autism (it is an extremely diverse disorder) but I think it shows that there is a significant difference outside of just what was learned in childhood.
And if the only difference was in childhood learning, you would expect that people with asbergers would be able to learn at least some of that situational awareness later in life. Based on people I know with asbergers, for many of them that is not the case - they never get even close to having intuition about social situations, they just end up memorizing rules and applying them when they seem to fit. Rather than intuitively knowing someone is angry/sad/etc. they use the rules they have memorized to make that determination. It is a completely different way of thinking. Of course this doesn't apply to everyone with autism (it is an extremely diverse disorder) but I think it shows that there is a significant difference outside of just what was learned in childhood.