I wouldn’t be betting blindly on anything in there carvills. There are dozens and dozens of different possible reasons why the results have turned out the way they have. I think statistical significance would vary from trainer to trainer and jockey to jockey. You’d certainly want to be following racing on a fairly regular basis to be able to draw any firm conclusions from it. That said the case against Culhane as a betting proposition on drifters is compelling imo.
I’m only going to leave this up for a day or two, so copy and paste quickly if anyone wants to keep it.