Airlock Alpha has an analysis of the 2008-09 and 2009-10 seasons through the end of November sweeps. The analysis shows viewership among genre shows to be down nearly 17.1 percent.
"Even some of the historically more stable shows have taken hard hits. "Smallville," which surprised The CW with strong ratings last year, has now lost nearly 41 percent of its audience falling from a 2.7/4 to a 1.6/3. Even "Supernatural" has felt the sting, losing more than 26 percent of its audience since losing "Smallville" as a lead-in from a 2.3/3 to a 1.7/3.
Although a lot of people are talking about the new The CW drama "Vampire Diaries," which has been getting the network's highest ratings, it's not performing as strong as "Smallville" did in its Thursday lead-in spot the year before. In fact, the audience for that timeslot is down more than 7 percent since "Vampire Diaries" took over."
On the Audience Loyalty Index rating, Supernatural went down from 2.3/3 [92.0] in 2008-2009 to 1.7/3 [81.0] in 2009-2010.
For the full analysis, click here.
Source: Airlock Alpha.