Gee, I actually prefer Lisa on American Dad. But then, I've always preferred brunettes to blondes.
Gee, I've seen other networks do similar things, but it's usually only after their initial campaign failed. For instance, ABC tried to advertise The Unusuals as a comedy, but after it bombed they switched to advertising it as dark and gritty. Then it bombed even harder. I don't know why Fox would have two different advertising campaigns at the same time. That seems pretty self defeating, though everything about Glee sounds self defeating. They're supposedly going to air one episode of Glee this season and they're not going to air the second episode till Fall. If that's not a failure waiting to happen I don't know what is.