Our tradition is that tit length (or bra-strap length) hair is long.
Shoulder length is short. In-between lengths are acceptable if there
is something special in the photos that people here like, such as hair-
touching, mirrors, silhouettes, long bangs falling over eyes, etc. I'm
guessing there wouldn't be any complaints about short hair used for
a hair job.
There are also certain models the moderators are partial to. Ninja
posted some Tera Patrick photos where her hair was just past her
shoulders. I would not object to new photos of Sophie Sweet or
Chasey Lain with shoulder length hair.