Childhood obesity has tripled in the past 30 years. Food companies spend $10 billion a year marketing in the United States, and 98% of that is on foods high in fat, sugar, or sodium.
Journal of Pediatrics, November 2012
You will need to decide for yourself if there is any correlation there or not. My belief is yes. And as such, it may be wise to help monitor your child's exposure to these marketing efforts. Likewise, make sure you are making healthy choices for you and your family.