I don't think our kids have necessarily had a harder time with potty training than is typical. We just didn't have any experience with it, and then all of a sudden we had two kids to potty train, so it's been a learning curve (times two) for all of us. But progress is being made, so I really can't complain. Here are a couple photo gems documenting the experience:
Doing chores in underwear:
Ok, so not the most flattering photo of me, but yes, that is me, a kid, and poo on the shower floor.
All the kids with umbrellas that they earned. Kate and Yeb earned them by completing potty charts, and Tam earned his by memorizing the 25 kindergarten sight words. This is the day that all 3 of them had finally earned them, and they decided to have an umbrella parade outside.