High-functioning sociopaths are pretty rare, I think.

But, historically, most of the data on sociopaths comes from the ones who end up in jail or therapy. Apart from the recent research, which you are rejecting on the grounds that it contradicts the older data, And your hunches, on which topic...

I don't have any hard data, so I have to rely on priors. 

.....or 'handwaving" as it's unsympathetically known.