My only guess is that the weather scared them away? We were supposed to get dumped on with rain that morning. Fortunately it turned out to be some of the best racing weather I have had all season (cool with no sun)!
The weather held off, which was surprising all things considered, i wanted to come and watch and cheer, but my wife has been battling some stomach/abdomen issues for the last month or so and had a tough Sat night so i stayed home. It is a shame the race was only like 10 mins from my house.