I'd say they are pretty common, at least for some time.
I agree - all the children should be WCVV - but I don't think they have the powers listed in the book until the demon manifests. Effectively they would be the same as any other child (just with a different potential).
Think of them as a Red Court Infected, fighting the inevitable, usually without prior knowledge until the big event happens. They also know someone can save them, which is more then what one of the Infected can say.
They may not know that - the one published example didn't.
As far as how old they are when the Hunger shows up, it doesn't seem to me like they are 14. More around the age of 18-22. Inari's Hunger woke up 'early', and she was old enough to perform in an adult video.
It's been a while since I read Small Favors, but didn't one of the WCV say something like "I've been wanting to drain you dry since <icky age>"
- or something like that?
I think the bit about the demon awaken has to do with the amount of food around. If Inari's Prom Date had scored a home run then I'm pretty sure that the Demon would have said "Nice - I'm out now. Shame about him dying like that.". But her father made sure that things like that didn't happen (because he wanted to break her afterward)... When the book is happening the demon is starting to thrash around saying "feed me!", taking the choice from her (and her father).
And while there's a group of RCV infected fighting the curse you never hear about a "WCV who won't turn" group.
But of course all of this is the subject impressions of a fictitious world - so there's plenty of room to compromise.
Richard
It's been a while since I read Small Favors, but didn't one of the WCV say something like "I've been wanting to drain you dry since <icky age>"
- or something like that?
Pretty sure Lara was talking about killing her...
Lara’s burned black right hand, withered, it seemed, down to bones and sinew, reached
slowly, sensually around Madeline’s straining abdomen. Slowly, very slowly, Lara sunk
her fingertips into flesh, just beneath the floating rib on Madeline’s left flank. Madeline’s
face contorted and she tried to scream.
Lara shuddered. Her shoulders twisted. And she ripped an open furrow as wide as her
four fingers across Madeline’s stomach, pale flesh parting, as wet red and grey
things slithered out.
That's what Lara does RIGHT after she makes the comment. It's not the feeding she's talking about, it's the ripping her apart she meant as best I can tell.