Yeah, we sent our ARC in october, but we had some other problems, like for instance they didnt ask for our RCMP BEFORE the arc... which is usually what they do. so we did the rcmp after the arc which caused a 1.5 month delay
and than on top of that they asked for some court documents from my husband and they were not specific, so we ended up sending them the wrong papers. so we are in the process of getting them the correct paperwork and hopefully we will finalize in the next month or so.
so our case was a little weird compared to most.
that last couple ARC that went through mexico city were 2 months or under. one of them was 2 Weeks!!
and yes they will email you asking for your passport