I think some places consider vintage to be 25 years or older (Etsy guidelines on what is considered "vintage). Antique is 100 years or older.
I like to sew with vintage if I find some that I like. I like a lot of the crazy colorful stuff from the 70's and the little floral prints from the early 80's. But mostly what I come across isn't any good for quilting, it's more apparel fabric (polyester, anyone?).