DD was awake a lot as a newborn. Right from the start she liked to lie on her back and kick her legs and interacted for 30 mins or more at a time, several times a day. For the 1st 6 weeks DS only woke up for feeds. He would feed back to sleep most of the time. Sometimes he'd stay awake for an extra 10mins. Some days I barely saw him awake. So I think it varies a lot. There is no need to worry unless they dont wake up for feeds, in that case its good to keep an eye on it.