Yup, gotta go with the provider on this one. Not that I won't do a morning nap, because I will, but not at the expense of the usual nap time routine.
Sounds like mom is new to the whole idea of multi-child care, and hasn't realized that the needs of the many outweigh the needs of the few. Did she not read the contract, and therefore the daily schedule? Is she not realizing that most kids are a little out of sorts when coming home from daycare? They are tired, from playing all day, and over stimulated. They are getting hungry, because it's usually close to supper time. They are miffed at mom and dad for being gone all day, and if it's a new situation they are still adjusting.
As for the "no desire to chit-chat"; Ummmm, is the provider still caring for other kids? She probably doesn't have time to stand at the door and shoot the breeze!! As we all know, that is exactly when little Johnny will choose to pull little Sally's hair, when she steals his toy, lol! Not to mention, it's the end of the day, she has put in her 10 or so hours and can't wait to be "off" so she can cook dinner, spend time with her family or get to hockey practice. Someone doesn't need to be bubbly and talkative to be a good provider. It's about how she takes care of the kids.
I don't think it's unreasonable for a child to be up for 5 hours, before bedtime.