 During the conflict, Stern made many negative remarks directed at Leno while on the "Late Show with David Letterman".In addition to criticism about his handling of the timeslot conflict, Leno has also been criticized for the perceived change in the content of his monologues from his previous stand-up material.Actor and comedian Patton Oswalt was among the celebrities who openly voiced disappointment with Leno, saying, "Comedians who don't like Jay Leno now, and I'm one of them, we're not like, 'Jay Leno sucks'; it's that we're so hurt and disappointed that one of the best comedians of our generation ... willfully has shut the switch off."