My layer cake was perfectly cut, it just shrunk in one direction. It won't stop me from buying precuts if they are on sale low enough, but I will continue to wash them. I had the experience of one fabric shrinking as I pressed a stack of finished blocks which made me a dedicated prewasher. I always prewashed for many reasons, but now I am much more careful to not let anything get by me. I like my finished quilt smoother than some people do so it matters to me.