Im not sure if sports will follow the same timeline: football is popular in North America and soccer in Latin America. Both sports weren't codified until the vert late 19th/early 20th century. So, with a dominant US in thia ATL Mexico I can see North American sports being as popular in Mexico. Also, Im pretty sure Catholic immigrants would prefer to immigrate to Mexican lands and live with their Catholic coreligionist. So, I would expect to see this Mexico to have more people of Irish, Italian and Polish descent.