Mom had all of us potty trained by the time we could say "Potty" which was around a year old. It's my own opinion that it's not so much potty training the child as it is training the adult to keep and eye on things and actually get up to do something about it. But, whatever works. I also think that some of today's mothers are too busy to deal with potty training---especially with all the so-called experts saying to wait.
My daughter was humming recognizable tunes before she could talk. If she was humming Old MacDonald and you asked if it was Twinkle Twinkle Little Star she'd frown but if you named it right she'd smile. Babies can learn a lot more than what we give them credit for. BTW, DD sings very well for an 11 yr old.