If you can be the first family to check in, they announce you specially...It's not something I would speed-walk/run for but some would. Also, there are two different check-in locations; one in front of the main entrance and one to the left. They both work the same, so use whichever is less crowded which in my experience has been the one to the left.
Your server will probably give you the typical spiel about the meal taking 1 hour and 15 minutes...ignore that; it's probably true later in the day, but both times I've been for an 8 am pre-opening breakfast we've been out of there before rope drop. We were seated, got the spiel and gave our drink orders last Saturday and Pooh was just one table away so we waited to meet him then went to the buffet for our first plates. Then we met the other three characters in fairly close succession before returning to the buffet for our second plates.