Life In 19x19

Okay, so it can really swing in both directions. Hard to know in which way the komi will affect the median score difference then? (not including komi)

The problem is that stronger players modify their play based on the komi, so you can't extrapolate from one komi to another without taking that into account.

EDIT:
Also, when you can count well and know what the score will be, you can play more conservatively to preserve a lead, resulting in a win ...

Interesting to ready what you have written.

to really find out the proper komi only by empirical means, also greater komi values must be tested (exclusively or by bidding).

That is why we should really store the score difference and the komi that was used for each played game, and not just who ...

Has there ever been studied which komidashi leads to a win/loss rate for white that is the closest to 50/50 when two equally good players play against each other?