Most likely, Square hair.
http://supernovo.net/wp-content/uploads/2013/10/Lightning-Demo.png
http://drunkengamersuk.files.wordpress.com/2008/08/final-fantasy-xiii-20080826034725928.jpg
http://assets.rpgsite.net/images/images/000/010/618/original/13207.jpg
As for FF15, they are really coming close to Advent Children in regard to look of the characters. Great stuff, same as with Agni's Philosophy.
http://www.agnisphilosophy.com/files/img/philosophy/screenshots/original_a.jpg
20,000 for hair is five times previous-gen? Are they talking in general, or about their own stuff? Because I'd be more than a little astounded if FFXIII is blowing 4,000 polys on hair on those models.
http://supernovo.net/wp-content/uploads/2013/10/Lightning-Demo.png
http://drunkengamersuk.files.wordpress.com/2008/08/final-fantasy-xiii-20080826034725928.jpg
http://assets.rpgsite.net/images/images/000/010/618/original/13207.jpg
As for FF15, they are really coming close to Advent Children in regard to look of the characters. Great stuff, same as with Agni's Philosophy.
http://www.agnisphilosophy.com/files/img/philosophy/screenshots/original_a.jpg