I posted back in April when my DS aged 2 began the whole potty training thing and to be honest it didn't go well. He was able to hold his wee for hours and only did one wee on the potty after three weeks of trying. By the end he was hardly going even in his sleep nappy.
After 3.5 weeks and much deliberation we decided to knock the whole idea on the head for a while. 4 months on we've had another go and this time he really seems to have got the hang of weeing on the potty (he's not attempted anything else as yet but he's only been at it a week!). I think this just goes to show there is no failure in realizing if your child simply isn't ready, he wasn't developed enough to be able to go on demand... I think if we'd carried on in April it would have just become a real issue for everyone so I'm glad I took the advice of another mum here and decided to give us all a break.
For what it's worth... my DS seems much more comfortable doing his weeing on his own. Performance anxiety perhaps if there's someone standing over him??? I don't know but left alone he's doing something almost every time - yey!
There does seem to be light in the potty training tunnel... hang in there and don't beat yourself up if your child isn't developed enough to do it when you or your friends / family think they should be.