So how much do we actually know about the character customization in X/Y?

Are the three character examples featured in CoroCoro the ones you initially get to choose from? Haven't actually heard any confirmation regarding this, and am kinda questioning it since the middle male one's skin tone doesn't seem to differ much from the Nordic-looking one. And while clothes and hair style/color have (I think?) been confirmed to be changeable, are eye color and skin tone traits that are set in stone once you've decided on your phenotype at the start of the game?