I had also wondered the same thing even though DS is a smidge younger. My DS is normally up for about 1 hour 15 mins per feed, and only feeds 4 times a day... so he's only up for about 5 hours a day (~19 hours sleep), and similiarly is happy & full of beans when he is awake. So saying, some days he is awake for a bit longer than that. But I didn't ask cos I thought I might sound daft...and for example, the mother's in my mother's group did NOT want to hear me wondering if my child was sleeping too much lol... so it's good to hear all the responses. I guess they each just have their own sleep requirements and we're lucky enough to get the ones that love their snoozy-time!

And lol Smiles4u, love that info!