I worked in glass industry for 40 years, about half of those in auto glass manufacturing, and I can attest to the angle of the windshield making the distortion more apparent. That said, it is quite possible for windshields that are outside the FMVSS standards to make it through the quality assurance process. So if you feel your windshield is causing problems, especially in the normal drivers viewing area, you should have it looked at by an auto glass installer.