I have a question regarding "Class-A" surfaces.
Take a look at this definition:
Class A surfaces is a term used in automotive design to describe a set of freeform surfaces of high efficiency and quality. Although, strictly, it is nothing more than saying the surfaces have curvature and tangency alignment - to ideal aesthetical reflection quality, many people interpret class A surfaces to have G2 (or even G3) curvature continuity to one another (see freeform surface modelling).
Class A surfaces can be defined as any surface, that has styling intent, that is either seen, touched or both.
Would you say that it is wrong?
To me it makes sense that tangency curvature can be "Class-A" in some situations.
It is from http://en.wikipedia.org/wiki/Class_A_surfaces