|One Tree Hill||0.85||0.91||-6%|
This doesn't apply to a large extent in other posts, but I should note that my True Strength spreadsheet only covers the official regular season. That doesn't matter for most of the other posts, but it does a little bit here since most CW shows premiere early.
Anyway, using official regular season numbers only, the CDub had four dramas with almost identical A18-49 averages but that are separated to some extent when run through the True Strength wringer. One Tree Hill led off the night in a very competitive timeslot, while Nikita had the benefit of a huge lead-in and Gossip Girl didn't have a ton of competition comparitively.
Hellcats was clearly a step down from the pack, and you can thank its late-season collapse for that. As of the end of 2010, it was almost neck-and-neck with Nikita (0.77 for Nikita vs. 0.76 for Hellcats).