I am in the extremely difficult position of not being able to ask anyone for advice because LK is training early. I have tried. Every single question from "where can I buy very small training pants that don't cost a small fortune?" to "do you have any suggestions for rewarding big successes (like holding it in until we reach a potty) in a child who is too little for the usual rewards?" gets met with "she's too young, don't even bother." It is supremely frustrating.
I believe you that you mean well, but your posts do come across as boastful about your child's success and your role in it, which unfortunately does come across as judgmental of parents whose kids do not share the same success. It really does come across (and I believe you that you don't mean it to) that you believe the "less successful" parents are doing something wrong. As a parent who knows a lot of other parents with children of varying ages and dispositions, I can affirm what other posters have said - what works for one child, may not work for another child, even siblings with the same parents in the same house, and yes, even twins.
As an aside, and to point out that your way is not the universally accepted best way even though it works for you, well respected child rearing experts advocate NOT rewarding children for something they should be doing anyway, like going potty in the potty. Encouraging them and praising them for it, yes. Rewarding them, no. Is it wrong to reward? Certainly not for a lot of parents. Is is wrong not to reward? Again, certainly not for a lot of parents.
I think there is some truth to this. I mean it's great that LK is being potty trained and that you are having success with that process. As I stated upthread, it was the near opposite of my approach, but I know people (and swap parenting tips) with parents who started at 6 months, so I have no issues with people who start earlier.
However, in order to potty train, my general theory (that anyone is free to disagree with) is that you have the
a) inclination of the child.
b) ability of the child.
c) level of parental involvement
With a lot of parental involvement you can affect the inclination and therefore the ability (to a limited extent). I think that you pretty much need a full time parent to potty train early. My kid is at daycare and, as far as I know, not a single kid at daycare was potty trained before 2. There were about 20 kids. Also, as far as I know, they are all trained by 4, but I have never asked.
So from that, I think it's possible to potty train before 2, but it involves a lot of work and a lot of luck.
I think what a lot of people are trying to say is that you are emphasising your knowledge in this area when there is a a lot of luck as well (which you have acknowledged, but have not as detailed) and it is important to realise that many kids, much older, with exactly the plan that you are using would simply not potty train.
Also (and more importantly) this parent isn't using poor potty training techniques. She is using no potty training techniques. She wants to wish hard and complain when it doesn't work. This isn't a parenting issue, this is a lazy complaining person issue. I bet she also complain when it doesn't rain money.
The lazy part, I'm down with. That is the approach I used to potty train. The complaining part, not so much (though I will acknowledge that I did some wishful complaining related to daughter's sleeping and proponents of various methods likely rolled their eyes)