Yeah, you've read so much you're confused, right? :?
It seems to boil down to a matter of personal preference. Some people prefer to not wash so that once washed as a finished quilt, it will develop that "heritage" look.
Others will not wash because it will be a wall hanging and not subject to use.
I prefer to pre-wash. My method has never been as thorough as KLue's, and from this point forward I will be following her advice. Maybe not [/i]all[i] that starch, though. I kind of like a softer feel.