Plus some of the biggest TV hits in history were not popular right out of the box. The Big Bang Theory ranked #68 in its first season, not becoming a Top 10 show until Season 5. Same with the original Night Court which did not become a Top 10 show until Season 4. Seinfeld was not Top 10 until...
The seemingly increasing number of quickly cancelled shows seems to be changing viewer behavior. I know I'm one of those that when looking for a new series will look for something with at least 2-3 seasons completed rather than taking a chance on a new show.
I'm not sure about some of the shows...