@dreyacosta @DavidChouinard the only SLA that exists tailored audience list processing is actually 24 hours. We generally see lists process in 4-6 hours, but we only guaranteed they'll be processed in 24 hours and you should anticipate that as a possible upper bound on processing time. While it's not normal for it to take the full 24 hours, it's quite possible and does happen.
I'm going to close this thread, but if you have a list that has clearly exceeded the 24 hour processing time and appears to be hung, please open a new thread and make sure to include enough actionable information that we can look into the issue for you.
Before starting a new thread, please make sure you've read and are following the Guidelines for Reporting Issues here in the forums.