There are certainly a limited # of robes available and they are washing them the first day BUT it never hurts to ask. Also hate to be gross but check them for cleanliness. Had a recent customer who gave up on them when 2 different attempts netted them unwearable robes.
I have always received robes, booked regular balcony cabins. Although, I've had to ask, but they certainly delivered them as soon as they came out of the dryer.