RitaFaye,
I think you can expect shrinkage. The amount of shrinkage will probably depend on how you washed the quilt. Lots of agitation and hot water, as well as a hot dryer will likely give you more shrinkage. How the quilt looks will also depend on whether or not you pre-shrunk your top and backing fabrics.
Yes, you are right that when they say "antiqued", they mean "wrinkled."