Oral arguments are a formality for show. They may or may not have any bearing on deliberations.
Judges now convene to discuss, vote, form alliances, vote again, lather, rinse, repeat, and then write their various opinions. They take as long as they like.
I assume chances of persuasion/changing of the minds is very slim at this point. Otherwise, the mental midgets (Bader-Ginsberg, Kagan, Sotomayor...) would would be overwhelmed, like going to a gunfight with a BB gun.
So now it is just a matter of who gets to write opinions and key wording within the writings?