I haven't looked into it enough to have any clear data, but I have always assumed that the distribution looks more like a layer cake than anything else. If you

I haven't looked into it enough to have any clear data, but I have always assumed that the distribution looks more like a layer cake than anything else. If you are X, then the people in the social groups immediately below and above you are assumed to be Y. Mainly because people compare themselves to the people directly adjacent to them. So if you are different enough to no longer be part of the "in group", then you are likely to be part of the "out group". Don't have any idea if there is truth to that or not.