I agree totally with the infant/parent connection. You will be able to tell instantly the type of parents and child that will be part of your daycare. I always let the parents know that just as they are interviewing me to see if I am the caregiver they are looking for, I am interviewing them to make sure that they will fit into my extended family.
Go with your gut feeling as to whether you are going to register the child, this is usually the right feeling.