I don't think so. That's pretty common. Most kitchens are probably tile, whereas the family rooms are wood.
Not at all. My house is like that and so is my girlfriend's parent's house and most of the houses I have seen with wood floors.
i dont understand why more people do not do stained concrete. i thnk it looks amazing. try looking under google images. and check acid stained concrete floors.
well thats a good question. i would assume though that it would be less expensive or at least around the same price.