With all that said, I am very much looking forward to potty training my not-so -little-anymore daughter. The Montessori method of potty training was brought to my attention a few months ago and I loved it immediately and plan on trying it with my daughter.
To many in the American culture it would be considered "early" potty training. While in other countries in may in fact be "late" potty training. All I know is that it makes sense.
The Montessori method explains that there are sensitive periods for learning different tasks and that the period of 18-24 months is the sensitive period for learning to control their bladder and bowels. Once this period is missed the supposed next period may be 3 years old. Now some may still be able to potty train their child during the terrible twos but it suggested that it's MUCH easier to potty train within these sensitive periods.
In contrast to the Montessori method in my husband's nursing book it states that most children are able to control their bladder and bowels around the age of 3-5, yikes! In the words of a good friend, "that's a really big butt to wipe!" haha :)
Want more details? This is a great article outlining the basics of the Montessori method: http://www.littleredrobin.com/pages/toileting_the_montesorri_way.asp
I personally have a couple friends who have potty trained their children "early" with much success. I have only a couple more months before I can start the process with my daughter, so I'm sure you will hear back on the progress in the future!