"Statistically significant" does not mean most.
Of course there is an issue with particular vehicles' brakes. Along with paint flaws/failures; extraneous noises; upholstery wearing out prematurely; transmissions failing; myriad electronic fubar mysteries; under panels coming loose; bumper misalignments; taillight misalignments; engines going "dead"/dud; and a passel of lesser mentioned one-off incidents, there is a "statistically significant" number of Stingers with "issues": but still not "most" or even close to half.
Of course, a lot of imperfections never see the light of day, because most people who buy and own material things (especially complicated things) understand that "nothing in life has any business being perfect", and don't get on forums and complain about every little thing. So, we will never know what percentage of this still new model actually have imperfections.
My "perfect" Stinger has imperfections; some permanent; most intermittent but endurable.
You get a perfect thing, in theory: and what happens when it comes into your possession? You, an imperfect human being, mess it up, one mistake at a time. None of us is worthy of owning perfect things. So why worry about brakes that are not perfect? Fix them. Under warranty or otherwise. Or get rid of the car and meet disappointment with your next car. C'est la Vie.