You should see the staggering percentage numbers of horses who prep on dirt and then run in the breeders cup the next race on synthetic surface...its something like 0 for 40.. craziness.
I think POTN ran last year cause it was Baffert. He had him prime to go and they still lost to MTB. Look at the similarity between the 3 prep races with POTN then the derby then next race out.. and compare that pattern to Sinister Minister! SAME THING... SM: Top, back, top, explode then BOUNCE.. then again with POTN: Top, back, Top, Explode, BOUNCE. Different surfaces...same outcome.