If you didn't do ANY sleep training, when did your children learn to get to sleep ...

[nothing2lose]

I think it has more to do with the personality of the child. I can honestly say I never had any issues with getting DD to sleep or sleeping for long periods. I don't think I did anything special or different to anyone else, and I certainly didn't go to sleep school. Honestly (and I am sure you don't want to hear this), I think I just lucked out

I really feel for those who struggle with a little one who doesn't sleep.

[MrsFabuloso]

My DD is 5 1/2 now, and though she doesn't go to sleep on her own, she sleeps most nights through and has for close to a year now. She wakes maybe once a week or so, due to bad dreams, or needing to go to the loo. I have to sit with her (and DS1 -they share a room) until they're asleep. Though I suspect that if she had her own room, she'd be able to go to sleep on her own, having me there is just habit now. She can self settle, and knows when she's tired and needs to go to sleep.
DS1 is 4 and sleeps through probably 4 out of 7 nights. Though can be more wakeful than that. He is getting better, but is terrible at self settling, and really does need me to be with him to go to sleep, to remind him to be still and relax, other wise he's a bundle of worms trying to make himself still! He can sometimes wake up to 3 times a night.
DS2 is still fairly wakeful in the night and needs someone to settle him. He cosleeps with DH or I and can't self settle. I rock him to sleep and have to pat him back to sleep at night, or bf him if he won't settle with patting and a dummy. He wake usually 2 times a night, sometimes up to 4-5 times still, depending on the night.
This is from children who have all mostly co-slept (and often still end up in bed with DH or I) and have been frequent wakers (up to hourly) when they were little, until about 2-ish.