We had breakfast there on 9/10. The wait staff was in character, but there were no pony races around the dining room or kissing contests. They did do the "ketchup thing" though, and they joked with us, but it was not to the extent that it was for dinner.
We've been having breakfast at WCC since 2003, and I think they've always had pony races when we're there. And one time our server made me get up and lead the whole restaurant in a round of Hokey-Pokey.