Just a quick update. For those of you who are at or approaching the AOR2 stage, I did get an actual email from the Mexican embassy (Miguel) today saying our app was received at their office. We saw the message "We started processing your application on May 4" in eCAS, so it took them 3 weeks to send the official email to say they opened our file. As it takes such a long time for them to actually open the file after transfer to VO (for us it was 7.5 weeks but sooner if you are not unlucky like us because I saw others have their status change after 4 weeks or so) and then obviously another long wait for them to email you. I would say check your eCAS often as it seems it takes them forever to update you by email, if you don't already know this. Under messages in our GCKey account, we also saw that they added this letter to the account. There was nothing else significant in the 3 page letter they sent us, only to outline what would happen if we were asked for an interview, things to prepare for should the PA receive a visa, how to send information/docs to the embassy and to not ask for status updates as they get "thousands of applications" to review.