Casting the Age of Miracles - too soon?

I first learned that the film rights to Karen Thompson Walker's Age of Miracles had been sold - even before the book hit the shelves -  last January, 2012.  Hanna screenwriter, Seth Lockheed is on board to write the adaptation.  Word and Film have a piece suggesting some casting ideas, including a few young actresses for the pivotal part of the rather introverted Julia. I like their idea of Kiernan Shipka, Don Draper's daughter on Mad Men but she may be too old by the time this happens - Julia's 11 while Kiernan is 13 already. I want to add Jackie Evancho to the list; she's a whopping year younger! We'll see the America's Got Talent singing prodigy soon in Robert Redford's The Company You Keep, not singing - as far as I know. And as far as I know, no deals have been made at this time, the movie is still listed as being in development so who knows how old anyone will be when the cinematic ball gets rolling. Do you agree; is it too soon to talk about casting?

I've just finished reading the book myself.  I'm not entirely sure what I think about it; it definitely didn't bore me; I was glued to the page. But there's something stopping me from gushing j'adore, or wowza or something, and I haven't quite crystallized what that is yet. I'll get my thoughts together at some point.

Kiernan Shipka

In the meantime here are the opening two very short paragraphs -

         We didn't notice right away. We couldn't feel it.

         We did not sense at first the extra time, bulging from the smooth edge of each day like a tumor blooming beneath the skin.  

Jackie Evancho

And a teaser -

It was October, but it felt like July: The air was summer air, the sky a summer sky, still light past seven o'clock. 

Posted for First Paragraph Tuesdays at Bibliophile by the Sea.      
Posted for Teaser Tuesdays over at Should Be Reading.

So what do you think? About the casting and the book?