If your daughter was taken, would you want to keep the faith that she was still alive? Weired? How would you react to a loved one being snatched from your home? The cruel, ignorant, judgmental criticism of some of the posters on this subject is a glaring testament to a total lack of empathy.
Honestly? I am the ultimate pessimist. If I lose a child in the grocery store for 30 seconds, I assume he's been abducted. I can't imagine holding out any hope if my child were really abducted and it had been over a week that she had been gone. On the other hand, I know that many people aren't like me and would hold out hope. I don't think we can make any kind of judgement based on whether the family seems hopeful or not.