RE: Any stories of success with potty training 18-24m?
I know people whose kids trained that young, but it was spontaneous training on their kid's part. And as you said, if you start at 18 months, they may finish training at age 2. Personally, thats 6 months of accidents I would rather live without!
I waited until DD asked me to go at age 28 months and it took about 2 weeks start to finish. It was probably another 4 weeks until I considered her really reliable (like able to take long car trips and air travel in underwear).
HTH,
Beth, mom to older DD (8/01) and younger DD (10/06) and always missing Leah (4/22 - 5/1/05)