 Talker Research also finds 34% of couples with similar cleaning habits have been in their relationships for five years or more. Deborah Rodriguez, CBS News. The McPlant is not going to be a thing. McDonald's says its test of using plant-based patties failed in the 600 test locations in the San Francisco and Dallas-Fort Worth areas. McDonald's said there just wasn't much demand for the McPlant, even in vegetarian-friendly San Francisco. Michael Toscano, CBS News.