I think for some of us of an age group, we are used to the American made cotton made by American grown cotton. There were certain industries standards, even if we weren't so aware from a consumer viewpoint. I;ve always maintained that there was not much difference in the greige goods being a 1980s Concord, CranstonVIP and a Hoffman -- the difference was in the number and costs of dyes and treatments.
Now while some are more local, primarily we are getting fabrics from cotton grown all over the world, and milled/produced all over the world, to standards/desires of all over the world.
Weight is not the only factor, a nice batik can be a much finer cloth than that Cranston or VIP. Both will work for a quilt, they can even work together, but in general it's just so much easier when things are similar weights.