Was it my imagination, seems everyone had better guest than O'Brien this week?

Harrison Ford & Cher were on Letterman on different nights. Kim Kardasian was on Leno. Harrison Ford was on Kimmel. Lopez had walk-ons by Jerry Springer, Wayne Newton and a former Laker player. Even Fallon & Ferguson has people & music that was outstanding. What happened with O'Brien's guest list for the week?