We got gabe a potty for an early Xmas present. He's sat on it a few times, for extended periods of time, (seriously, like 45 minutes) with nothing.
The other day though we came home, he pulled off his pants and diaper immediately and sat down on the potty. And he peed!! I realize this may be tmi, but I was so excited! He pooped on the potty that night too. (that was more because I saw the "poop squat" and put him on the potty.
There's only been that one time so far, but I'm hopeful because he constantly wants to sit on the potty. Maybe diapers will be a thing of the past soon.