I am making a generalization here, but from what I understand the majority of applications don't get processed in under 10 months.
@starnaenae is at 12 months and just a got pre-arrival letter, while
@majesty is at 14 months or more, I believe. Others may better be able to weigh in on this, as my specific application is only going into its 7th month- so we won't be participating in action-taking at the moment (don't want to poke the bear!).
But generally, people express frustration with lack of communication and transparency from Mexico VO as well. Mexico has a really high work load too, as I understand, and is responsible for processing applications from many countries in Latin America.