Interesting post. I'm not sure though if I agree with the idea of single graves in the Irish bronze age being a result of a more egalitarian society. Rather, I would see the reverse--a cult of the individual arising where 1 person might take his/her goods to the Otherworld. In the earlier communal tombs, even though it was most probably an elite who were buried there, you don't see a lot of grave goods and its not uncommon to find people of all ages and both sexes commingled. I don't believe either period was particularly egalitarian, and the idea of peaceful fluffy neolithic people is also untrue.
Like some of the other posters on the KOS site, my own ancestry is from Ireland, and interestingly my family too were very dark even black haired and brown or hazel eyed. I have been asked if I have Mediterranean ancestry more than once.