On Flint code, ask these guys but it looks like NEC 2014.
Among other things, 2014 code gives you broad flexibility to retrofit grounds.
NEC is a model regulation, meaning it's written by a private party with an eye toward offering it to States to adopt as their law. Most States do. This is commonly done with State laws, as it's wasteful to maintain 50 completely separate laws for the same thing.
NEC is written by committees at the NFPA, the National Fire Protection Association, a non-profit organization who is out to save lives and save insurers money. It creates a quasi-standard so a California electrician can transfer his skills to Michigan with little trouble. States can write their own code if they really want to, but it's a huge expense to administer it, and it's gonna come out about the same anyway. Like Canada's separate Code. EU has a totally separate Code, which Russia, Ukraine and Belarus are adopting, even though they're not part of the EU.
The guys on TV don't care much about accuracy. A breaker for every kitchen receptacle would be required if you only had two of them.
Now here's why they did it, and why it's a great idea. Think about a high-end California customer like on the show. Heck, think about anybody who cooks these days. They have lots of kitchen gadgets. Many gadgets are 1500W, and if you put two of them on the same breaker, it'll trip even if it's a 20A (2400W) circuit. And kitchen receptacles are rarely marked. So plugging in randomly, the cook has a 50% chance of an annoying breaker trip, and running 3 such appliances is absolutely out of the question. How annoying.
Whereas, if each duplex receptacle is on a separate circuit, it becomes rather intuitive for the chef to avoid the trip problem.
What's the cost of this? If you're DIY'ing, the cost is ridiculously low - maybe an extra $100 - $200 tops - which is rounding error on a kitchen remodel. This longer wires and extra GFCI devices. The biggest problem with this setup is needing more slots in the breaker panel, which is why I'm absolutely bananas about buying the largest panel you can possibly buy. Seriously, 60 is not too many.