We took advantage of a week of vacation to try one nap since N's were getting later, shorter or skipped. Slowly moved her 10:00 am nap to 11:30 over the course of a few days and didn't offer the second nap. She was already doing 5 hours of wake time do to her early risings. Her nap is a bit short at an hour or hour and a half (I guess 2 is ideal) but her night sleep has gone from 10 hours to 11-12 and I'm soooooo glad that I'll take a slightly shorter nap to get 6am wake ups. We're doing early bedtime 6 or 6:30 based on nap length and it seems to be OK.
I do miss the two breaks in the day but now we can join a playgroup and take music class so I'm crossing fingers this keeps working.
Re: Could it be...sleep has come...
I'm pushing for one nap now but it's going to take time; she'll adjust when she's totally ready. Hopefully soon. I like one nap!!