If the panel gap is not "neat", which is not the same as "small", then it looks bad.
I don't know if I could find a source, but it would probably be something like Forbes in the '80's: Lee Iacocca (of Chrysler) said that they learned from Japanese collaboration that if they made their gaps wider, then they appeared neater because they appeared parallel. And it was cheaper to make a wider gap, and it was easier for QA to pass the cars. Otherwise the cars would have to be whacked with mallets until the narrow gaps looked right, and that slows the line, and that indirectly adds cost.
[This doesn't mean that the Japanese collaborators were making huge panel gaps on their own cars, it simply indicates that Iacocca('s people) got a certain idea from them]
I don't know if I could find a source, but it would probably be something like Forbes in the '80's: Lee Iacocca (of Chrysler) said that they learned from Japanese collaboration that if they made their gaps wider, then they appeared neater because they appeared parallel. And it was cheaper to make a wider gap, and it was easier for QA to pass the cars. Otherwise the cars would have to be whacked with mallets until the narrow gaps looked right, and that slows the line, and that indirectly adds cost.
[This doesn't mean that the Japanese collaborators were making huge panel gaps on their own cars, it simply indicates that Iacocca('s people) got a certain idea from them]