Conan O'Brien made his much-anticipated appearance on 'The Late Show with David Letterman' last night and they wasted little time before ripping on Jay Leno.

Dave and Conan actually kicked off the interview with an awkward silence...after which Dave said, quote, "I think the longer we just sit here, the more uncomfortable it will make Jay."

Then Conan joked, quote, "You know [Leno is] watching right now. You know he's getting a live feed in a satellite truck right now. He is watching every second."

Dave also said he considered the whole Conan / Leno / NBC mess to be, quote, "the golden age of television."