Dubai v. Breeders Cup question...

[smuthg]

I've attended the last 3 Breeders' Cups in person and I think at least 3 horses to my count have broken down on the track (GW, Fleet Indian and the Phipps filly in the Distaff) [and I think they actually lost one at Belmont in 05], yet I've watched the last couple Dubai World Cup day series of races and don't think I've even noticed a horse being pulled up... Is this a product of the lack of drugs, better surface, luck or some product of all three...