Off the top of my head, I would imagine that the shorter one's fingers, the more one would benefit from using "classical" left-hand technique ~ that is, to keep the thumb centered on the back of the neck, thereby extending the fingers around and over the top of the fingerboard as far as possible.

This eliminates fretting the bottom strings with the thumb, of course, which is a fairly common folk/blues technique which is completely unknown and "verboten" ~ and considereed entirely unneccesary ~ in the classical-guitar world. The trade-off is that the fingers are not only given the maximum possible reach, they also come down onto the fingerboard at the best possible angle, straight down from directly above.

Our buddy Little Hawk started a thread last week or so on this topic ~ he's re-teaching himself to play with this refined technique. As for myself, I play the "wrong" way and, since it's not a problem for me, do not intend to reform at this time. But for someone concerned about the length of his/her fingers, it's probably worth consideration.