If he can hold it, he's at least physically ready... and I'm not a big believer that potty training causes major emotional turmoil that many kids aren't ready for at 2 or 3.. so I say go for it! If the problem is that he's holding it too long to stay on the potty, I would not have him just sit there at all... instead, put him in underwear (throw away the diapers or put them away for night and naps, but symbolically throw them away), and wait until he starts to have an accident, THEN move him there. He'll have to go eventually. If you move him to the potty every time he pees or poops, he'll get it. If diapers are not being made available as an alternative, he'll prefer the potty to his pants. If you're consistent and reward him (praise and SMALL rewards) when he makes it in even a little bit, I bet he's trained in a couple of days (some kids take longer because they have to train their bodies to hold it; yours does already.
at 8:25 PM on Dec. 14, 2009