Perhaps this situation will lead to a paradigm shift of sorts. FNC is very profitable. If they pull this off while pulling in an older demo, then perhaps such demos won't be rejected in the same knee jerk fashion that they are at present.
However, one point I haven't seen in this thread yet that is worth exploring, is the amount paid for FNC influenced to any degree by the fact that the same entity owns Fox Broadcast? Could News Corp be taking a bit less for that property in order to make FNC look more profitable? CNN has no such leverage, and in fact, is owned by a competitior to a lot of cable systems so they may be more willing to squeeze CNN for a better deal. That and their smaller cume make it easier to do so.