nah, I'm swiss so I'm used to quite some different ethnicities (and I also like to travel) 
It's not very easy to describe the problems as I can't quite put my finger on them. Take a look at this screenshot for example:

I think the eyes are ok. the nose seems a bit large but ok. the mouth on this model is fine (even though on other models it's gigantic *g*). but what seems wrong are the jaw and cheekboness. maybe also the chin a bit. the form of the cheeks might be too concave, I'm not sure. It just doesn't feel right.
also, the available textures for males don't seem natural.
compare it to this picture, which, in my opinion, looks very realistic (caucasian, google for male head to see a lot of 3d models of different racial backgrounds to compare):

take special note on the positions of the cheekbones, jawline and the edge of the jaw (or whatever its called in english) below the ear. its close, but definitely different in a way which seems unnatural to me.
the women heads, on the other hand, are quite well-formed as far as I can tell.
well. I'm just a bit tired of games having perfect beauties as females and males which can hardly be called human 
Hope this makes my point a bit clearer.
Ora