I've never timed my dogs, but the fastest eater is Vallis, followed by Adele, and Marta is last. I can literally put the bowl down, turn around and look back and Vallis is all done with his meal (he gets about 3/4 cup twice a day).

Marta used to turn her nose up at food until we put her on a diet (she was getting bit chubby). Now she never does, but she's still a slow eater.