The traditional command for starting engines before a NASCAR race has been, "Gentlemen, start your engines." Not altogether accurate, since few stock car drivers were historically gentlemen, but close enough. When women entered the sport it was changed to "Drivers, start your engines," which seems reasonable enough.
And then along came Danica Patrick. I think the Grand Marshall today meant to say, "Gentlemen and Danica, start your engines," which I think would have been in poor taste but in line with the Danicamania that prevails today. What he said though was, "Drivers and Danica, start your engines," which would imply that Danica is not a driver. Freudian slip?