I've been trying to decide on my wall/ceiling color (decorators white or chantilly lace ) and my painter seems to have already bought a flat regular white ceiling paint for my ceilings .. she says it'll match fine with the wall color I choose...

Is that true ? Or should I insist she paint my ceilings, say, a decorators white?

This is in a kitchen w white cabinets and a foyer , Jacobean floors ...