callie, it seems to be the trend to leave children in nappies a lot later than even 5 or 10 years ago. I have looked after over 30 children and I have to say that without exception I have potty trained those in my care by the age of two.
I'll probably stir up a lot of feeling about this but, I believe there is a period of time around 18 -20months where the child realises what is going on, if catch that time you can be very successful at training. My DD was dry at 15 months, because she took her nappy off everytime she wet it, she was dry at 18 months at night and never ever had any accidents. My DS , everyone told me would be different, well he is only a year younger than DD, he did everything she did, he copied her all the time, he was dry day and night together at 18 months.
Both my children walked at 9months and I think that this early developement stage follows though in terms of physical achievement. It's like the african thing of being able to put your hand over your head and touch the other shoulder, to determine whether youare ready to go to school. They were in their time big babies at 9.8 and 9.12, but DD was so petite at a year and DD was a hulking great No 8!
I would say Go for it, if you can tell by her face if she is doing something, ask her if she is doing a wee,poo etc, so she gets used to the idea of whats happening, if DD can ask for things, ie potty, and understands lots of things, show her by example, take her to the toilet with you, ask her if she'd like to sit on the pot at the same time. Use it whe she gets up, bathtime etc to start with, if you have a success, great, but do remain very relaxed about it.
My feeling about toilet training is it is a learned habit as well as a physical thing, and as long as children continue to use their bnapppies for toileting, it becomes a habit. My freind has realised this with her nearly three year old, she was dry during the day at 2, but as they had several long flights and were travelling over three weeks, she decided to put her back in nappies ans it would be less hassle while travelling. She knows now that her DD is just using her pull ups as a convenient place to do it!
Good luck, let us know how you get on!