not if you buy them from an lqs- or store-
they are simply cut off the bolt- at an lqs they simply pull out 1/2 yd of fabric, cut it- cut again at the fold- and fold the fat quarter.
the only time you will find pre-washed pre-cuts is if you buy them from a person who pre-washed their fabric- then cut the pre-cuts (maybe a yard sale= or thrift store)
but bought from a store- they are new off the bolt fabrics- just pre-cut for you