My 12-month-old seems to be right in the middle of the switch! Her b-day was this week and I'd say three weeks ago she began modifing her nap schedule - some days she takes two and some just one. On the days she takes one she is fussier, but sleeps better through the night. It has me guessing right now and is making bedtime a little confusing too!!! I hope she settles on one soon!
14 months. I teach, so the transition at the end of the school year, from being at grandma's house to being home with me all day was a natural one.
I should mention, too, that the morning nap became shorter and harder to get for about four months before we nixed it altogether. We moved his afternoon nap earlier, and those actually got a little longer.