He has a point. The TD/CG wasn't cute and was NOT Superbowl worthy. It was like a marketing strategy to attract small kids to want to attend her concerts "Mom I wanna go to Katy Perry concert please" for real, because if not that, then WHY THE **** ?
There is difference between Fun, Childish and Kinder Garden kind of childish. It was the latter of those 3.. You can be fun and colorful without being Teletubis kind of childish...
Other than that though, her performance had great moments. Let's applaud Katy for achieving this success and pulling it off