My DS just turned 4 and he dropped his day naps over 6 months ago. Before he dropped his day nap we would put him to bed at 7:30pm and he would sing and chant sometimes for over and hour and a half! Once I dropped his nap he would fall asleep really quickly and rarely makes any noise now. He now goes down between 7:30-8pm and sleeps until 7 - 8am.

If your DD is happy, I wouldn't be too worried! They are all so different.