I don't know. Jimmy's supposed to be Clark Kent's pal, wouldn't that cause some conflict if they make the a character a beautiful woman? (Conflict with Lois as the romantic lead, that is.) While we all know that woman and men can be "just friends", Hollywood has difficulty with this concept and starts out many of romance with friendships. Now, if "Jenny Olsen" turns out to be Lois's pal, not Clark's, then that makes more sense.