Regionals in Masters take a long time. How long it lasts usually depends on the amount of people that show up, but with Registration ending at 9:30, expect Round one pairings to go up at like 10:30-11, and with 6-8 rounds for Masters, I'd say Swiss should end like 6-8 depending on how everything goes.
EDIT: glaceon, Masters is a two-day event for the TCG, but in VA, they say there's a possibility they could squeeze the Masters TC into one day depending on the showing (which I doubt).