Both ours slept the majority of the day in the weeks after they were born, and that seems to be pretty common amongst my friends as well. Of course, every baby is different and YMMV!
The problem tends to be more that they don't sleep in long enough time blocks... So you get punctuated sleep. When my son was little we eventually adopted his sleep pattern as much as we could for naps to compensate for the broken sleep..
When he got a bit older, one of the highlights of the weekends was taking him to soft play because we knew it meant we'd get a nearly 3 hour nap afterwards.. The first time he came back from it and didn't fall asleep was soul crushing...
