Chrome,

Those figures regarding track conditions are a bit of mischief, though I'm not doubting they are correct.

What happens to field sizes on rain effected tracks? They go down [and so do the odds by the way]. The more rain affected ground, the more scratchings. The smaller the field size the more favorites win regardless of conditions.

Your stats. support a deceptive conclusion only, they certainly don't disprove that it is easier to win on good and dead tracks.

There is a mathematics professor in the USA who at the start of every year 'proves' to his new students that 2+2=3.99 !!!

You are comparing apples and oranges using smoke and mirrors and stats. are a great way to do it [just ask any politician] :-)