well, definitely yes!  but since i'd also need to shift the materials of everything else, i'd still need to learn how to incorporate it into other materials (i say admonishingly to myself).  i'm very sure the hair shader i've been messing with for ages would be better in sRGB, since the most important aspect of shiny hair is the contrast between its light and dark portions.  usually, when people say hair doesn't have bright enough shine, what actually needs to happen is the dark areas get dark enough.