I think its quite clear from that video that Dan isn't very good and is carried by Kate. The whole thing in the video seems a bit wooden and more melancholy than usual, but probably because its basically stand in presenters right the way through. I'd like to see Lucy Verasamy stand in for Christine one day. I imagine she'd go one way or the other and be appalling or fantastic.
Lucy would be awful as main host, shes only just calmed her nerves in the last couple of months. Even over christmas she was stumbling words, and you could hear the nerves in her voice. She's a lot better now as I said.
I really like Dan as a main host, hes got that breakfast TV sort of personality, much like Eamonn in a way - quite jokey and charasmatic. I don't think Kate carries him at all, he works just as well with Christine and even Grainne. Grainne was fine this morning aswell, she seemed to be having fun throughout the 7am hour and don't forget she presented Sky News Ireland so she has a lot of journalism experience.