Krypixel, whose tweets (posted today) were analyzed and translated upthread, doesn't have a location on her twitter profile. Her blog post from the 20th referenced Uruquay. She's apparently relatively poor, so lengthy travel likely isn't an option for her, so she probably lives in the area.
The hunch is still that her taxi driver was referencing seeing TAR LA, and not live racers, though, so it's probably all for nil.
ETA (2:08 AM EST, Dec 01): She just confirmed that they aren't. Carry on, fine detectives. (twitter status