Hi ladies that is exactly where I am right now too! DD used to be a wonderful 2-3 hour sleeper since we moved to 1 nap at 16 mo. She's now 25 mo and we switched to a day care facility after our move and OT monster showed up. She doesnt' nap there at all, 30 min max, and she is a heaping mess when she gets home, barely makes it through dinner, my sweet little girl is not fun to be around.
On weekends she used to make up for it by sleeping longer but I think that it has all caught up with us now. Now her naps are 1 hr 15 min MAXXXXXXXXXXXXXX! Like you guys say, they are just so cranky in teh afternoon.
I've had her at home with me all week trying to do earlier naptime, and earlier bedtime to help her catch up on sleep, some days have been better than others and now DST is around the corner, UGH!
For me at least 1 hr 15 min is when she's OT, when she's well rested she sleeps 11.5 hours at night and 2-3 during the day and is a DREAM child! I'm hoping to get back to that soon!
GL!