First, a generalization. In 4 years, there have been 14 CW TV stocks. 9 ran the full season of 18-24 episodes and 2 ran for the full 13 initial order. Only 3 had the plug pulled early. 2 Sunday nighters in '08, and BTFULF in '09 (delisted at 2) So.....the folks at CW are very slow to pull the trigger.
Personally, I think the last show I watched on CW or either of the predecessors was Star Trek: Voyager, so I am not one to sample the offerings. On the other hand, I am way above the age of the target audience.
All 3 freshmen are following established CW shows, so if you are tuning in to GOSIPG, you stick around for HRTDIX. Fans of 90210C stick around for RINGER. Like VAMPDI ? We have SECRCL for you. At least that is the plan, and I would assume that the folks at CW will leave these alone until at least the initial 13 are shown. (Note: If you are a fan of HELCAT, well there is always Netflix)