I understand that the terms and conditions say UP TO 90 days. Previously, I transferred MR points last month and transfer took a day, a friend around the same time transferred and 1 day. Any thread on FT that people share their experiences with AM seems to show the actual typical transfer time at 3 days or less. Jump to online blogs. All of them state terms (as you noted) but then state their personal experiences which are a week or less, with most stating that the transfer usually happens within 24 hours. I have yet to find evidence anywhere online of people saying the real world transfer time was more than a few days, unless there was some other problem....
Such as an error in one's name.
Thank you for the update though.