@jennythelib - I'm totally going to try that for my son's next birthday party! He and his friends always eat way too many sweets (cake, ice cream, etc.) and then after the party, he's so irritable. It can't hurt to try subbing out some of the "white carbs."
I already tried it Christmas morning -- this past year we had whole grain English muffins with bacon and eggs instead of cinnamon rolls -- and I felt like it really helped keep him from crashing later.