Alas there is nothing new in any of this. I remember reading of a project undertaken at least 30 years ago where a student took photos of his colleagues and projected them on to each other according to their cultural and geographical origin. The differences between Welsh, Scottish and English students were quite distinct and did in fact conform to the stereotypes. Again the 'average' face was indeed very attractive but that is hardly surprising given that we are conditioned to respond to what is most 'normal' (or not abnormal) and so an average face is likely to to represent the mean of the proportions found in human faces. This could of course be expressed another way by pointing out that beautiful people are in fact very average!