If you want to get a pretty good indication if a call is "planted", is listen to how the host is talking with the caller. Talk show hosts just have a knack for talking down to a regular caller. The host already has it in his mind that he's smarter than the caller, and you're not going to tell him anything he doesn't know. Now, if it's a plant, the host won't talk down to that person, they'll talk "with" the caller. That's because the host knows it's someone he interacts with on a regular basis when he's off the air. Ever notice how much different a host will treat someone if they come on for a guest interview as compared to someone calling into the program? Like in Moody's case, he'll treat a driver, crew chief, etc. with a whole lot more respect than a regular caller. The plant gets treated with a lot more respect, too.