Not rid of the naps yet at almost 2.5, but DS has always been nocturnal and needed a daytime rest. He dropped his morning nap around 18 months.
The first 6 months were an aggressive effort to invert his circadian rhythm. We literally went for walks with DS at 2:00am and slept until afternoon for a month after he was born (longer for me, DH returned to work after a month), and he would scream nonstop for 6 hours from 8:00pm onward if he wasn't nursing or being read to. I remember walking on the treadmill slowly with DS in the Bjorn at 1:00am on cold nights, reciting books from memory. My mother sympathized because, apparently, I was the exact same.
People doubt whether you can tell early if your child is gifted. I say measure the dark circles under the parents' eyes and you have a good indicator. That or check cortisol.
