Welcome to the Insiders forum! Additionally, thanks for reigniting the discussion around this.
In checking with our team about transferring Rewards points to American Airlines Advantage Miles, it seems that the timeline is 1-2 weeks for the transfer to be complete, as well as post.
As you have done here, the Insiders site is a wonderful place to ask questions and seek insights! Also, we're here to help. Don't hesitate to reach out to me (joshm), CariJ, or lindseyh with any questions or concerns. We make up the community management team for the page.
Thank you for posting.
PS- Sorry for the delay fry1. Hopefully this information helps!