From now until.. well... a long time from now... Getting there prior to lunch being served will be the time to go. The newness won't wear off for a while, and lunch stops serving at 2 (or the line closes at 2.. not sure yet). People will be going to see the restaurant, especially if they don't have a dinner reservation. We plan on being there as early as we can when we go next week in order to check it out. People will end up lingering in the restaurant a while because they will want to look at everything.
The reports I'm hearing say that the line to get into the restaurant moves, but it can take up to 30 min just to get to a table when the line is long. So, even if the line is long before the restaurant opens, you'll be more inclined to get to a table quickly once you order (which seems to be the longest part.. getting to order).