Until my DD was walking, she rarely napped for more than an hour. In fact, half an hour was probably about it most of the time. She did nap alot, and wasn't too hard to get to sleep most of the time, but it was a real treat when she began napping for 1.5 to 2 hours! That happened around her first birthday, when she began walking in earnest and dropped down to one nap a day. I've never considered her an abnormal sleeper. I think babies are just so different, that was just who she was, kwim?