I'm definitely no expert, but it seems to me that the two pieces of evidence he uses to date the creation of "whiteness" aren't very reliable. As one commenter on his blog pointed out, cave painting may be dark simply because that was the color they had available. And in terms of the Egyptians, the woman may simply have been portrayed as wearing make-up...not as being white. And even if his hypothesis is correct, I don't see how a white person in the Baltic would end up marrying the Pharaoh.