There is an easy answer to this, and that is because the growth in the size of passenger aircraft was linear for a period of time. As we all know, higher the wing loading, better the “ride” through turbulence. read more
If you mean which aeroplane handles turbulence best, I will say any aeroplane with high wing loading (high weight compared to wing area). The F-104 is a very good contender to the title, because the wings are very small. read more