Mexican player here. I'd recommend playing on ethernet cable, as at least my company hiccups on wi-fi every now and then, leading to some weird lag at the worst moments. Other than that the ping SHOULD be fine unless they're from, idk, Guerrero or Quintana Roo, i.e. way in the South and thus farther from the servers, but shouldn't really be notiecable.

Note: México is weird in that we're part of NA but for legalese we're not. As in, SE promotions, contests, refunds, etc. don't apply to México. I think it's because SE would HAVE to make their contracts and contest rules in Spanish and it's not something they're interested in. Can a Canadian player confirm if Quebec has the same problems?