I've had problems with the size of some FQs that I've purchased. I expected them to be at least 18 inches long. Some of them were less than that.
The one pack of FQs I bought at JoAnn's several yeaars ago were MAYBE 18 inches long if I stretched them, and then only on one edge. I think the story/explanation they gave me that the fabric was cut while stretched - or something that made zero sense to me.
I had also purchase batiks (at $9.80) a yard at one of the LQS and the clerk was smoothing and smoothing the fabric before cutting it. At least four of the eight pieces I purchased were short - maybe only 1/8 to 1/4 inch, but still. I did complain to the manager and got a gift certificate. I won't complain even if it's cut to the thread (I may not return - ever - but I won't complain), but don't short me.
The shop Quilts on Plum Lane in Dade City, Florida cuts their fat quarters generously.
But do I complain if they give me an extra inch or two? Of course not :-)