I tried a full blown shader setup with blinn but it didn't have the same results as using it on a solid object. I'm not sure for certain how the shading works for the dynamic strands produced in hair groups. I think it's not quite the same as considering it like the mesh surface of a solid object.
We could use some input from bb I suspect.

When you think about it though, a strand of hair is very translucent. It may be that the effect of strong light shining behind hair isn't quite the same as the specular effect you get with the Blinn node in any case. And it's worth remembering that even Blinn is only one model of a surface specular reflection effect. I've been considering this a lot lately with skin, where I've really started to want a more accurate specularity for use with IDL.

 

PoserPro2014(Sr4), Win7 x64, display units set to inches.

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