that's another "yes" form us too.
dd1's first attempt at potty training was when she was 2.6, because her nursery deemed it was the irght time 
that went horribly worng (can't think why!) and led to dd1 holing on for hours and hours, and restricting drinking.
we backed off for over a year. just concentrated on other stuff
second time we tried, dd1 understood a little better, but was clearly not going to get it anytime soon. I had d2 just beginning to crawl abuot, and investigate kitchen cupboards and stuff, so wasn't in a position to devote loads of time to it, so we backed off for another 9 months or so.
then, on the third attempt, she got it. she was 4.6, and I'd noticed a few times she was waking (or at least, I was waking her) and she had a dry nappy. so I thought I'd give it a go - after all, who doesn't wee first thing? but we were back to holding on for hours.
this time, though, there was a change. she seemed ot be trying to wee, but couldn't work out which muscles she needed to use (coudl see her contracting tummy, and shifting around). so we stuck with it, keeping as close by the loo as possible, and encouraging her to drink as much as possible (a tricky one for dd that - she was drinking maybe 200ml a day at this point) - we seemed to be living in the loo at one point!
and then, one day, she managed it (well, she started weeing, and we shoved her on the loo) and, tbh, she hasn't looked back since.
very occasional accidents, but once she got it (took maybe 4 weeks), and understood how to wee, she was dry, and has been since.