I think waiting is a good idea. I agree with the strategy of the time slot opening caused by canceled shows. My reasons are more personal. I want to forget about the past racers, before the new ones are introduced. I don't want to make comparisons. I'd rather view the show fresh each time.
Their time slot should be 8-9 or 9-10. There is no reason for it to be on after 10. The earlier they are on, the bigger the audience.