D.H.
My 4 1/2 year old wears good nites too. He was potty trained and 3, but is a deep, deep sleeper. From reading and talking to the doctor, it can be up to 7 or 8 years old before they accomplish the overnight dry. Other kids are fine.
Mine has just had two nights dry!! We are now consistenly 1-2 nights a week dry. We ar just waiting it out!!
Good luck