It was in the season or two after the Digital Shorts started blowing up that they really went hard for the 'tweener audience. You could see it in the sketch writing and casting as well as host picks. There was a definite, concerted slant to capture/retain that audience. The casting of Abby, Nasim, Jenny, Taran and I think even Paul were attempts to add faces who would appeal to 'tweeners.
I mean, didn't you wonder why Abby was allowed to hang around for four seasons, Stu? In part I think was due to Lorne hoping vainly that she'd develop into a breakout star with 'tweener appeal.