I feel as if TSCC was never given the opportunity to shine, ratings-wise. First, it was scheduled opposite established heavy hitters. And then it was sent to Fridays, where Fox sends shows to die. (Was it scheduled against Battlestar Galactica on Fridays? I don't recall if TSCC or Dollhouse had that unenviable slot.)
Second, I'm extremely dissatisfied with the Nielson ratings system. I've seen too many brain-dead, superficial, trash fests take top ratings for me to believe Nielson accurately represents viewers. Hey, maybe I'm wrong, but we need a competitor to Nielson to either confirm or disprove.
Online & DVR viewings should be given equal weight to live viewings. And what about credit for DVD sales revenue. People aren't going to purchase Dancing with the Stars on DVD, but they sure will add a shows like TSCC and BSG to their DVD collections.
I can't shake the feeling that network decision-making is behind the times, that they're basing their renewal decisions on the same sort of data they did last century, without adequately valuing the alternate revenue streams a good genre series generates. Narrow focus on live viewing figures is an anachronism and hurts the quality of television programming. (And even the live viewing figures are suspect.)