Of course like all stats Chrome they will support anything you like [you don't work for the Government do you?].

The important info that has not been taken into account in your figures is that wet tracks decimate field sizes. The wetter the track the more scratchings there will be so naturally the eventual favorites for 'X' number of say 'heavy' track races, might have 50% less runners than the same number of races on a 'good' track.

Naturally under these [distorted] circumstances more favorites will win on wet tracks. Try the states again were the runner numbers are the same [all things being equal] and you will have crumbs on your chin old boy.

Myth Buster Busted :-))