Mexico team/fans upset about playing in sub-freezing weather and Costa Rica was upset a few cycles ago playing on a snow covered field in Colorado.
Having much of the qualifying take place in winter months is making things interesting this cycle.
But it is similar to when visiting teams play at Azteca at over 7000 ft or in humid conditions in Costa Rica. Called home advantage. US team had a rough time in swampy conditions last night in Jamaica, seemed to have no energy at all in the second half.