My ds does, and I'm wondering if he'll ever give them up!
He sleeps like a log from around 7.30/7.45pm until 7.00/7.15am, and very rarely wakes during the night.
When he's at nursery, he never sleeps during the day, but as soon as he's got a day at home, he's nodding off at 3pm. If he's really tired or it's getting late, I'll try and keep him awake, otherwise I'll let him sleep an hour or so. He'll sleep for longer if he could, though.
He hasn't slept today and, as always, we got to 4pm and turns into a hyperactive horror with tiredness.
He's an August birthday, and will be just turned four when he starts school next September. Someone please reassure me that he can stay awake through the day by then ...