I have three children under ten and I have a guilty confession. Aside from the first three months of each of my children's lives, I have pretty much been able to get a full nights sleep every night almost without exception.
My youngest, now eight months old, has been sleeping 8-12 hours straight a night since he was two months old. And he should be. He's a growing boy. His sleep cycles were set early. My husband worked hard to ensure that he got his circadian rhythms set as soon as his belly was big enough for him to sleep through.