We went last week, had completed online check in, arrived around 1pm and got the text about 45 minutes later. I did go to the front desk on arrival and was told I wouldn't receive the text until the room was cleaned and ready. We did not get our request to be near the lobby/lobby elevators but did get an upgrade from standard view to lagoon view so no complaints.
We had brought bathing suits in our carry on, so just headed straight for the pool to hang out and wait.