You're welcome. -------------------------- Exactly. I've noticed this all the time on morning news shows and CNN, etc. The interviewer will say: "Thank you for being on the show" and the one being interviewed will say: "Thank you" in return.
I guess the "in thing" to do these days is thank the person for thanking you instead of just saying "You're welcome".
I think the one being interviewed is saying "Thank You" as a shorthand way of saying "Thank you for having me on your show." I often hear the exchange go "Thank you for coming" and "Thank you for having me."