Blue Room said:
It was a complete rumor posted by someone on Zootopia that said they were the friend of a friend that knew Dallas Schoo. "Supposedly" it was done in studio rehearsal prior to Vancouver. Take that one with a grain of salt. Alot of the supposed Mexico lists are VERY unsubstantiated.
Someone on this forum also reported that a friend of theirs was working in the same location that U2 were using to rehearse in California earlier this year and that person heard Wire, The Unforgettable Fire, and Exit. Exit was also apparently rehearsed in studio in Dublin last year.
Nonetheless, I am taking all of that along with the Mexican setlists with a grain of salt. The Mexican sets seem to be pretty inconsistent to me. The Vancouver rehearsals I'm prepared to trust more, especially because some people I know listened and I trust their reports.