Puffin of my 3 kids only one came remotely close to meeting the sleep begets more slep adage. She was the only one that napped much beyond 48 months too. 9:30 would be too late for my kids but that's because they all wake at the crack of dawn regardless of bedtime. If they could sleep longer in the mornings then bedtime would only depend on getting enough hours in and the practical requirements of our morning routine...