The trick was, they were able to remove the chicken from the bone in a cost-efficient manner, which is why it took so long for people to copy them — 10 years, then within a couple months, it was such a hit, they introduced it across the entire McDonald's system in the country.
Les tomó 10 años, y entonces en un par de meses fue tal éxito que los introdujeron y los desplegaron a través de todo el sistema de McDonald 's en el país.