We'll be having a baby girl in early February. I think the 10-15% is in case our baby was trying to hide something. My dad mentioned that he only remembered one time where they missed at his work, so I doubt we'll have any surprises.
Between my wife liking the color purple and the pink for the little baby girl, we're going to have one ugly pastel house. I'm going to paint the basement black when it's finished just in protest.