Lynn, maybe you weren't there early, with shiny new pins, lots of thread, a seam ripper, and plenty of practice fabric, but you did pay for the class and show up. I think the instructor should consider his or her objective to be helping each person in class achieve their own objectives, regardless of where they are starting from. It shouldn't be the instructor's job to criticize your preparedness or arrival time, (after all, you are a grown-up, not a fifth grader!) ...just deliver the class content as best she can.
I hope you don't bear a grudge as it won't help you have fun with that quilt.
I hope you can put her criticism in your mental wastebasket and DONT GO BACK THERE TO GET MORE!
:) :) :) :) :)