I've had calls for next day care and I've told them that the process of finding the right daycare families is just as important as them finding the right daycare. I need to have an interview... good luck on the interview and ask a lot of questions. There is a thread on questions to ask in here so take a peak and arm yourself with some good questions other than a yes or no answer from the parents.

I like to give people the benefit of the doubt but also put in the trail period as Lou mentioned to protect yourself in case. Just like Reggio says, they may not be happy with their current provider and who knows what situation is and they may be removing her from a bad situation? Maybe her simming over details was so she could give you more details in person.
Ask her for more of the details if she doesn't offer any more info.

Good luck- have my fingers crossed for you!