Here's a tweet from about 4 hours ago that appears to be from someone who saw a team or teams running in the airport at Mexico City.
Acabo de ver corriendo en el aeropuerto a los de The Amazing Race. Cosas random que pasan en el DF.
5:06 PM - 17 Nov 15
Which Bing translates as
I just saw running at the airport to The Amazing Race. Things random happening in Mexico City.
Not the best translation, but close enough I think. If anyone can do a better translation, feel free to do so.