Based on the site they just look at Google trends. They don't state when they searched or what time frame.
For example, look at this map:
I know Floridians can be crazy but I doubt alligator meat is their top dish. The map itself says it's about what people in the state search for. Yet the title on the article says "This Amazing Map Shows Which Food Each State Eats The Most". Those are not the same thing.
It'd be like saying your top search on Pornhub is DP. It just means you're curious about it, doesn't mean you actually do it.
For that TV map you posted the article title says "This Map Shows What People In Each State Are Binge Watching On Netflix". Again, it's unclear on the specifics.
In conclusion, that site (homesnacks) sucks.
Source:
http://www.homesnacks.net/amazing-map-shows-food-state-eats-126299/