Very nice Luc, as always very good and realistic results from your side.
I think you can play a bit more with the specular and gloss-maps for a little more different distribution of specs and gloss over the face, but overall, a good approach.
Btw, did you modify the head by yourself or did I miss this one on the Ten24-site ?
Edit: got it: http://www.ten24.info/?p=1164
I think this is a perfect reference-model for the upcomming skin-shading tests here.
We all should use this one to have really comparable results.