No, this was down the street from the convention center and had been put up way before Anime Expo and E3, so this was more about informing people who wouldn't know otherwise and may not be video game fans (because that part of downtown is mainly financial businesses) than marketing to anime fans who would have already known about the game's existence.
Wasn't it visible from the convention center? I was at Anime Expo that year, and I recall walking outside and starring at a giant Vanille lol xP