My 13 year old is somewhat like Sophia. I have seen this often with typcially developing siblings of those with disabilities.
I am really enjoying this show and am glad I stuck with it. I'm wondering how they are going to tie it all up, though. I also hope they don't do more seasons as I can see this show becoming more populated with child actors (and I am sure many of the current Bonanza City residents are in that profession) and even more scripted than it is now!