Not really... there's no set appearance for people in their thirties. My mother looked just like that (literally just like that-- the similarity is unnerving) at that age. She hasn't really changed much since.
yeah, that was for the Science Fiction Book Club omnibus, and they decided that the blue shirt might be too similar to how Dan painted her on Moon Called so they made that change at the last minute. I felt the cover version looked pretty good, but I prefer the original