And BTW..... we were at the Poly the other night for a bit. I saw this MASSIVE line (maybe around 6 or 6:15) and wondered what the heck it was. So I went up to the front to read the sign which said "wait her for the next available hostess". It was indeed the line to check in. And it wasn't the start of the night. And it looked to be far longer than than the 15 minutes they tell you to arrive ahead of your ADR time.
Which line - right or left (as you look at the podium from entering from the monorail)? O'hana has started a line along the left side for stand-by diners (right side is for those with ADRs). It kind of looks like the line outside the hot nightclub with all the regular people waiting/hoping to get in.